1033 lines
29 KiB
Go
1033 lines
29 KiB
Go
// Copyright (c) 2013-2017 The btcsuite developers
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// Copyright (c) 2015-2016 The Decred developers
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// Copyright (C) 2015-2017 The Lightning Network Developers
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package main
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import (
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"bytes"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/pem"
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"fmt"
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"io/ioutil"
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"math/big"
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"net"
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"net/http"
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_ "net/http/pprof"
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"os"
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"path/filepath"
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"runtime/pprof"
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"strings"
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"sync"
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"time"
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"gopkg.in/macaroon-bakery.v2/bakery"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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proxy "github.com/grpc-ecosystem/grpc-gateway/runtime"
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flags "github.com/jessevdk/go-flags"
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"github.com/lightningnetwork/lnd/autopilot"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/keychain"
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"github.com/lightningnetwork/lnd/lnrpc"
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"github.com/lightningnetwork/lnd/lnwallet"
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"github.com/lightningnetwork/lnd/lnwallet/btcwallet"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/lightningnetwork/lnd/macaroons"
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"github.com/lightningnetwork/lnd/walletunlocker"
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"github.com/roasbeef/btcd/btcec"
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"github.com/roasbeef/btcd/wire"
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"github.com/roasbeef/btcutil"
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"github.com/roasbeef/btcwallet/wallet"
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)
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const (
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// Make certificate valid for 14 months.
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autogenCertValidity = 14 /*months*/ * 30 /*days*/ * 24 * time.Hour
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)
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var (
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//Commit stores the current commit hash of this build. This should be
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//set using -ldflags during compilation.
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Commit string
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cfg *config
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shutdownChannel = make(chan struct{})
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registeredChains = newChainRegistry()
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macaroonDatabaseDir string
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// End of ASN.1 time.
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endOfTime = time.Date(2049, 12, 31, 23, 59, 59, 0, time.UTC)
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// Max serial number.
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serialNumberLimit = new(big.Int).Lsh(big.NewInt(1), 128)
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/*
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* These cipher suites fit the following criteria:
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* - Don't use outdated algorithms like SHA-1 and 3DES
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* - Don't use ECB mode or other insecure symmetric methods
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* - Included in the TLS v1.2 suite
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* - Are available in the Go 1.7.6 standard library (more are
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* available in 1.8.3 and will be added after lnd no longer
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* supports 1.7, including suites that support CBC mode)
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**/
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tlsCipherSuites = []uint16{
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tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
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tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
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}
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)
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// lndMain is the true entry point for lnd. This function is required since
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// defers created in the top-level scope of a main method aren't executed if
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// os.Exit() is called.
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func lndMain() error {
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// Load the configuration, and parse any command line options. This
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// function will also set up logging properly.
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loadedConfig, err := loadConfig()
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if err != nil {
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return err
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}
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cfg = loadedConfig
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defer func() {
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if logRotator != nil {
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logRotator.Close()
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}
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}()
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// Show version at startup.
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ltndLog.Infof("Version %s", version())
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var network string
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switch {
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case cfg.Bitcoin.TestNet3 || cfg.Litecoin.TestNet3:
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network = "testnet"
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case cfg.Bitcoin.MainNet || cfg.Litecoin.MainNet:
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network = "mainnet"
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case cfg.Bitcoin.SimNet:
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network = "simnet"
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case cfg.Bitcoin.RegTest:
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network = "regtest"
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}
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ltndLog.Infof("Active chain: %v (network=%v)",
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strings.Title(registeredChains.PrimaryChain().String()),
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network,
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)
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// Enable http profiling server if requested.
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if cfg.Profile != "" {
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go func() {
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listenAddr := net.JoinHostPort("", cfg.Profile)
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profileRedirect := http.RedirectHandler("/debug/pprof",
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http.StatusSeeOther)
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http.Handle("/", profileRedirect)
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fmt.Println(http.ListenAndServe(listenAddr, nil))
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}()
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}
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// Write cpu profile if requested.
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if cfg.CPUProfile != "" {
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f, err := os.Create(cfg.CPUProfile)
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if err != nil {
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ltndLog.Errorf("Unable to create cpu profile: %v", err)
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return err
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}
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pprof.StartCPUProfile(f)
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defer f.Close()
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defer pprof.StopCPUProfile()
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}
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// Create the network-segmented directory for the channel database.
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graphDir := filepath.Join(cfg.DataDir,
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defaultGraphSubDirname,
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normalizeNetwork(activeNetParams.Name))
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// Open the channeldb, which is dedicated to storing channel, and
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// network related metadata.
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chanDB, err := channeldb.Open(graphDir)
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if err != nil {
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ltndLog.Errorf("unable to open channeldb: %v", err)
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return err
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}
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defer chanDB.Close()
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// Only process macaroons if --no-macaroons isn't set.
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ctx := context.Background()
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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// Ensure we create TLS key and certificate if they don't exist
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if !fileExists(cfg.TLSCertPath) && !fileExists(cfg.TLSKeyPath) {
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if err := genCertPair(cfg.TLSCertPath, cfg.TLSKeyPath); err != nil {
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return err
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}
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}
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cert, err := tls.LoadX509KeyPair(cfg.TLSCertPath, cfg.TLSKeyPath)
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if err != nil {
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return err
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}
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tlsConf := &tls.Config{
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Certificates: []tls.Certificate{cert},
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CipherSuites: tlsCipherSuites,
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MinVersion: tls.VersionTLS12,
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}
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sCreds := credentials.NewTLS(tlsConf)
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serverOpts := []grpc.ServerOption{grpc.Creds(sCreds)}
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cCreds, err := credentials.NewClientTLSFromFile(cfg.TLSCertPath, "")
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if err != nil {
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return err
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}
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proxyOpts := []grpc.DialOption{grpc.WithTransportCredentials(cCreds)}
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var (
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privateWalletPw = lnwallet.DefaultPrivatePassphrase
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publicWalletPw = lnwallet.DefaultPublicPassphrase
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birthday time.Time
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recoveryWindow uint32
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)
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// We wait until the user provides a password over RPC. In case lnd is
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// started with the --noencryptwallet flag, we use the default password
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// for wallet encryption.
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if !cfg.NoEncryptWallet {
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walletInitParams, err := waitForWalletPassword(
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cfg.RPCListeners, cfg.RESTListeners, serverOpts,
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proxyOpts, tlsConf,
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)
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if err != nil {
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return err
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}
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privateWalletPw = walletInitParams.Password
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publicWalletPw = walletInitParams.Password
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birthday = walletInitParams.Birthday
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recoveryWindow = walletInitParams.RecoveryWindow
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if recoveryWindow > 0 {
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ltndLog.Infof("Wallet recovery mode enabled with "+
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"address lookahead of %d addresses",
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recoveryWindow)
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}
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}
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var macaroonService *macaroons.Service
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if !cfg.NoMacaroons {
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// Create the macaroon authentication/authorization service.
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macaroonService, err = macaroons.NewService(macaroonDatabaseDir,
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macaroons.IPLockChecker)
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if err != nil {
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srvrLog.Errorf("unable to create macaroon service: %v", err)
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return err
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}
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defer macaroonService.Close()
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// Try to unlock the macaroon store with the private password.
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err = macaroonService.CreateUnlock(&privateWalletPw)
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if err != nil {
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srvrLog.Error(err)
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return err
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}
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// Create macaroon files for lncli to use if they don't exist.
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if !fileExists(cfg.AdminMacPath) && !fileExists(cfg.ReadMacPath) &&
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!fileExists(cfg.InvoiceMacPath) {
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err = genMacaroons(
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ctx, macaroonService, cfg.AdminMacPath,
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cfg.ReadMacPath, cfg.InvoiceMacPath,
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)
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if err != nil {
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ltndLog.Errorf("unable to create macaroon "+
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"files: %v", err)
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return err
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}
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}
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}
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// With the information parsed from the configuration, create valid
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// instances of the pertinent interfaces required to operate the
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// Lightning Network Daemon.
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activeChainControl, chainCleanUp, err := newChainControlFromConfig(
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cfg, chanDB, privateWalletPw, publicWalletPw, birthday,
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recoveryWindow,
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)
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if err != nil {
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fmt.Printf("unable to create chain control: %v\n", err)
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return err
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}
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if chainCleanUp != nil {
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defer chainCleanUp()
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}
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// Finally before we start the server, we'll register the "holy
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// trinity" of interface for our current "home chain" with the active
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// chainRegistry interface.
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primaryChain := registeredChains.PrimaryChain()
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registeredChains.RegisterChain(primaryChain, activeChainControl)
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// Select the configuration and furnding parameters for Bitcoin or
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// Litecoin, depending on the primary registered chain.
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chainCfg := cfg.Bitcoin
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minRemoteDelay := minBtcRemoteDelay
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maxRemoteDelay := maxBtcRemoteDelay
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if primaryChain == litecoinChain {
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chainCfg = cfg.Litecoin
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minRemoteDelay = minLtcRemoteDelay
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maxRemoteDelay = maxLtcRemoteDelay
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}
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// TODO(roasbeef): add rotation
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idPrivKey, err := activeChainControl.wallet.DerivePrivKey(keychain.KeyDescriptor{
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KeyLocator: keychain.KeyLocator{
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Family: keychain.KeyFamilyNodeKey,
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Index: 0,
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},
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})
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if err != nil {
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return err
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}
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idPrivKey.Curve = btcec.S256()
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if cfg.Tor.Active {
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srvrLog.Infof("Proxying all network traffic via Tor "+
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"(stream_isolation=%v)! NOTE: Ensure the backend node "+
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"is proxying over Tor as well", cfg.Tor.StreamIsolation)
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}
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// Set up the core server which will listen for incoming peer
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// connections.
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server, err := newServer(
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cfg.Listeners, chanDB, activeChainControl, idPrivKey,
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)
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if err != nil {
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srvrLog.Errorf("unable to create server: %v\n", err)
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return err
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}
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// Next, we'll initialize the funding manager itself so it can answer
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// queries while the wallet+chain are still syncing.
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nodeSigner := newNodeSigner(idPrivKey)
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var chanIDSeed [32]byte
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if _, err := rand.Read(chanIDSeed[:]); err != nil {
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return err
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}
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fundingMgr, err := newFundingManager(fundingConfig{
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IDKey: idPrivKey.PubKey(),
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Wallet: activeChainControl.wallet,
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PublishTransaction: activeChainControl.wallet.PublishTransaction,
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Notifier: activeChainControl.chainNotifier,
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FeeEstimator: activeChainControl.feeEstimator,
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SignMessage: func(pubKey *btcec.PublicKey,
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msg []byte) (*btcec.Signature, error) {
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if pubKey.IsEqual(idPrivKey.PubKey()) {
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return nodeSigner.SignMessage(pubKey, msg)
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}
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return activeChainControl.msgSigner.SignMessage(
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pubKey, msg,
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)
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},
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CurrentNodeAnnouncement: func() (lnwire.NodeAnnouncement, error) {
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return server.genNodeAnnouncement(true)
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},
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SendAnnouncement: func(msg lnwire.Message) error {
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errChan := server.authGossiper.ProcessLocalAnnouncement(msg,
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idPrivKey.PubKey())
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return <-errChan
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},
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SendToPeer: server.SendToPeer,
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NotifyWhenOnline: server.NotifyWhenOnline,
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FindPeer: server.FindPeer,
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TempChanIDSeed: chanIDSeed,
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FindChannel: func(chanID lnwire.ChannelID) (*lnwallet.LightningChannel, error) {
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dbChannels, err := chanDB.FetchAllChannels()
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if err != nil {
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return nil, err
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}
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for _, channel := range dbChannels {
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if chanID.IsChanPoint(&channel.FundingOutpoint) {
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// TODO(roasbeef): populate beacon
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return lnwallet.NewLightningChannel(
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activeChainControl.signer,
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server.witnessBeacon,
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channel)
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}
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}
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return nil, fmt.Errorf("unable to find channel")
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},
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DefaultRoutingPolicy: activeChainControl.routingPolicy,
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NumRequiredConfs: func(chanAmt btcutil.Amount,
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pushAmt lnwire.MilliSatoshi) uint16 {
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// For large channels we increase the number
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// of confirmations we require for the
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// channel to be considered open. As it is
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// always the responder that gets to choose
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// value, the pushAmt is value being pushed
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// to us. This means we have more to lose
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// in the case this gets re-orged out, and
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// we will require more confirmations before
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// we consider it open.
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// TODO(halseth): Use Litecoin params in case
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// of LTC channels.
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// In case the user has explicitly specified
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// a default value for the number of
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// confirmations, we use it.
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defaultConf := uint16(chainCfg.DefaultNumChanConfs)
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if defaultConf != 0 {
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return defaultConf
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}
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// If not we return a value scaled linearly
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// between 3 and 6, depending on channel size.
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// TODO(halseth): Use 1 as minimum?
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minConf := uint64(3)
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maxConf := uint64(6)
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maxChannelSize := uint64(
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lnwire.NewMSatFromSatoshis(maxFundingAmount))
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stake := lnwire.NewMSatFromSatoshis(chanAmt) + pushAmt
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conf := maxConf * uint64(stake) / maxChannelSize
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if conf < minConf {
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conf = minConf
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}
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if conf > maxConf {
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conf = maxConf
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}
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return uint16(conf)
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},
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RequiredRemoteDelay: func(chanAmt btcutil.Amount) uint16 {
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// We scale the remote CSV delay (the time the
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// remote have to claim funds in case of a unilateral
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// close) linearly from minRemoteDelay blocks
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// for small channels, to maxRemoteDelay blocks
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// for channels of size maxFundingAmount.
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// TODO(halseth): Litecoin parameter for LTC.
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// In case the user has explicitly specified
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// a default value for the remote delay, we
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// use it.
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defaultDelay := uint16(chainCfg.DefaultRemoteDelay)
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if defaultDelay > 0 {
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return defaultDelay
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}
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// If not we scale according to channel size.
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delay := uint16(btcutil.Amount(maxRemoteDelay) *
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chanAmt / maxFundingAmount)
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if delay < minRemoteDelay {
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delay = minRemoteDelay
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}
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if delay > maxRemoteDelay {
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delay = maxRemoteDelay
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}
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return delay
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},
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WatchNewChannel: func(channel *channeldb.OpenChannel,
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addr *lnwire.NetAddress) error {
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|
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// First, we'll mark this new peer as a persistent peer
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// for re-connection purposes.
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server.mu.Lock()
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pubStr := string(addr.IdentityKey.SerializeCompressed())
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server.persistentPeers[pubStr] = struct{}{}
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server.mu.Unlock()
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|
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// With that taken care of, we'll send this channel to
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// the chain arb so it can react to on-chain events.
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return server.chainArb.WatchNewChannel(channel)
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},
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ReportShortChanID: func(chanPoint wire.OutPoint) error {
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cid := lnwire.NewChanIDFromOutPoint(&chanPoint)
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return server.htlcSwitch.UpdateShortChanID(cid)
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},
|
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RequiredRemoteChanReserve: func(chanAmt,
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dustLimit btcutil.Amount) btcutil.Amount {
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|
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// By default, we'll require the remote peer to maintain
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// at least 1% of the total channel capacity at all
|
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// times. If this value ends up dipping below the dust
|
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// limit, then we'll use the dust limit itself as the
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// reserve as required by BOLT #2.
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reserve := chanAmt / 100
|
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if reserve < dustLimit {
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reserve = dustLimit
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}
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|
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return reserve
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},
|
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RequiredRemoteMaxValue: func(chanAmt btcutil.Amount) lnwire.MilliSatoshi {
|
|
// By default, we'll allow the remote peer to fully
|
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// utilize the full bandwidth of the channel, minus our
|
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// required reserve.
|
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reserve := lnwire.NewMSatFromSatoshis(chanAmt / 100)
|
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return lnwire.NewMSatFromSatoshis(chanAmt) - reserve
|
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},
|
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RequiredRemoteMaxHTLCs: func(chanAmt btcutil.Amount) uint16 {
|
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// By default, we'll permit them to utilize the full
|
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// channel bandwidth.
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return uint16(lnwallet.MaxHTLCNumber / 2)
|
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},
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ZombieSweeperInterval: 1 * time.Minute,
|
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ReservationTimeout: 10 * time.Minute,
|
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MinChanSize: btcutil.Amount(cfg.MinChanSize),
|
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})
|
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if err != nil {
|
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return err
|
|
}
|
|
if err := fundingMgr.Start(); err != nil {
|
|
return err
|
|
}
|
|
server.fundingMgr = fundingMgr
|
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|
|
// Check macaroon authentication if macaroons aren't disabled.
|
|
if macaroonService != nil {
|
|
serverOpts = append(serverOpts,
|
|
grpc.UnaryInterceptor(macaroonService.
|
|
UnaryServerInterceptor(permissions)),
|
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grpc.StreamInterceptor(macaroonService.
|
|
StreamServerInterceptor(permissions)),
|
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)
|
|
}
|
|
|
|
// Initialize, and register our implementation of the gRPC interface
|
|
// exported by the rpcServer.
|
|
rpcServer := newRPCServer(server)
|
|
if err := rpcServer.Start(); err != nil {
|
|
return err
|
|
}
|
|
|
|
grpcServer := grpc.NewServer(serverOpts...)
|
|
lnrpc.RegisterLightningServer(grpcServer, rpcServer)
|
|
|
|
// Next, Start the gRPC server listening for HTTP/2 connections.
|
|
for _, listener := range cfg.RPCListeners {
|
|
lis, err := net.Listen("tcp", listener)
|
|
if err != nil {
|
|
ltndLog.Errorf("RPC server unable to listen on %s", listener)
|
|
return err
|
|
}
|
|
defer lis.Close()
|
|
go func() {
|
|
rpcsLog.Infof("RPC server listening on %s", lis.Addr())
|
|
grpcServer.Serve(lis)
|
|
}()
|
|
}
|
|
|
|
// Finally, start the REST proxy for our gRPC server above.
|
|
mux := proxy.NewServeMux()
|
|
err = lnrpc.RegisterLightningHandlerFromEndpoint(ctx, mux,
|
|
cfg.RPCListeners[0], proxyOpts)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, restEndpoint := range cfg.RESTListeners {
|
|
listener, err := tls.Listen("tcp", restEndpoint, tlsConf)
|
|
if err != nil {
|
|
ltndLog.Errorf("gRPC proxy unable to listen on %s", restEndpoint)
|
|
return err
|
|
}
|
|
defer listener.Close()
|
|
go func() {
|
|
rpcsLog.Infof("gRPC proxy started at %s", listener.Addr())
|
|
http.Serve(listener, mux)
|
|
}()
|
|
}
|
|
|
|
// If we're not in simnet mode, We'll wait until we're fully synced to
|
|
// continue the start up of the remainder of the daemon. This ensures
|
|
// that we don't accept any possibly invalid state transitions, or
|
|
// accept channels with spent funds.
|
|
if !(cfg.Bitcoin.SimNet || cfg.Litecoin.SimNet) {
|
|
_, bestHeight, err := activeChainControl.chainIO.GetBestBlock()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ltndLog.Infof("Waiting for chain backend to finish sync, "+
|
|
"start_height=%v", bestHeight)
|
|
|
|
// We'll add an interrupt handler in order to process shutdown
|
|
// requests while the chain backend syncs.
|
|
addInterruptHandler(func() {
|
|
rpcServer.Stop()
|
|
fundingMgr.Stop()
|
|
})
|
|
|
|
for {
|
|
select {
|
|
case <-shutdownChannel:
|
|
return nil
|
|
default:
|
|
}
|
|
|
|
synced, _, err := activeChainControl.wallet.IsSynced()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if synced {
|
|
break
|
|
}
|
|
|
|
time.Sleep(time.Second * 1)
|
|
}
|
|
|
|
_, bestHeight, err = activeChainControl.chainIO.GetBestBlock()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ltndLog.Infof("Chain backend is fully synced (end_height=%v)!",
|
|
bestHeight)
|
|
}
|
|
|
|
// With all the relevant chains initialized, we can finally start the
|
|
// server itself.
|
|
if err := server.Start(); err != nil {
|
|
srvrLog.Errorf("unable to start server: %v\n", err)
|
|
return err
|
|
}
|
|
|
|
// Now that the server has started, if the autopilot mode is currently
|
|
// active, then we'll initialize a fresh instance of it and start it.
|
|
var pilot *autopilot.Agent
|
|
if cfg.Autopilot.Active {
|
|
pilot, err := initAutoPilot(server, cfg.Autopilot)
|
|
if err != nil {
|
|
ltndLog.Errorf("unable to create autopilot agent: %v",
|
|
err)
|
|
return err
|
|
}
|
|
if err := pilot.Start(); err != nil {
|
|
ltndLog.Errorf("unable to start autopilot agent: %v",
|
|
err)
|
|
return err
|
|
}
|
|
}
|
|
|
|
addInterruptHandler(func() {
|
|
rpcServer.Stop()
|
|
fundingMgr.Stop()
|
|
if pilot != nil {
|
|
pilot.Stop()
|
|
}
|
|
server.Stop()
|
|
})
|
|
|
|
// Wait for shutdown signal from either a graceful server stop or from
|
|
// the interrupt handler.
|
|
<-shutdownChannel
|
|
ltndLog.Info("Shutdown complete")
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
// Call the "real" main in a nested manner so the defers will properly
|
|
// be executed in the case of a graceful shutdown.
|
|
if err := lndMain(); err != nil {
|
|
if e, ok := err.(*flags.Error); ok && e.Type == flags.ErrHelp {
|
|
} else {
|
|
fmt.Fprintln(os.Stderr, err)
|
|
}
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
|
|
// fileExists reports whether the named file or directory exists.
|
|
// This function is taken from https://github.com/btcsuite/btcd
|
|
func fileExists(name string) bool {
|
|
if _, err := os.Stat(name); err != nil {
|
|
if os.IsNotExist(err) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// genCertPair generates a key/cert pair to the paths provided. The
|
|
// auto-generated certificates should *not* be used in production for public
|
|
// access as they're self-signed and don't necessarily contain all of the
|
|
// desired hostnames for the service. For production/public use, consider a
|
|
// real PKI.
|
|
//
|
|
// This function is adapted from https://github.com/btcsuite/btcd and
|
|
// https://github.com/btcsuite/btcutil
|
|
func genCertPair(certFile, keyFile string) error {
|
|
rpcsLog.Infof("Generating TLS certificates...")
|
|
|
|
org := "lnd autogenerated cert"
|
|
now := time.Now()
|
|
validUntil := now.Add(autogenCertValidity)
|
|
|
|
// Check that the certificate validity isn't past the ASN.1 end of time.
|
|
if validUntil.After(endOfTime) {
|
|
validUntil = endOfTime
|
|
}
|
|
|
|
// Generate a serial number that's below the serialNumberLimit.
|
|
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to generate serial number: %s", err)
|
|
}
|
|
|
|
// Collect the host's IP addresses, including loopback, in a slice.
|
|
ipAddresses := []net.IP{net.ParseIP("127.0.0.1"), net.ParseIP("::1")}
|
|
|
|
// addIP appends an IP address only if it isn't already in the slice.
|
|
addIP := func(ipAddr net.IP) {
|
|
for _, ip := range ipAddresses {
|
|
if bytes.Equal(ip, ipAddr) {
|
|
return
|
|
}
|
|
}
|
|
ipAddresses = append(ipAddresses, ipAddr)
|
|
}
|
|
|
|
// Add all the interface IPs that aren't already in the slice.
|
|
addrs, err := net.InterfaceAddrs()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, a := range addrs {
|
|
ipAddr, _, err := net.ParseCIDR(a.String())
|
|
if err == nil {
|
|
addIP(ipAddr)
|
|
}
|
|
}
|
|
|
|
// Add extra IP to the slice.
|
|
ipAddr := net.ParseIP(cfg.TLSExtraIP)
|
|
if ipAddr != nil {
|
|
addIP(ipAddr)
|
|
}
|
|
|
|
// Collect the host's names into a slice.
|
|
host, err := os.Hostname()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
dnsNames := []string{host}
|
|
if host != "localhost" {
|
|
dnsNames = append(dnsNames, "localhost")
|
|
}
|
|
if cfg.TLSExtraDomain != "" {
|
|
dnsNames = append(dnsNames, cfg.TLSExtraDomain)
|
|
}
|
|
|
|
// Generate a private key for the certificate.
|
|
priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Construct the certificate template.
|
|
template := x509.Certificate{
|
|
SerialNumber: serialNumber,
|
|
Subject: pkix.Name{
|
|
Organization: []string{org},
|
|
CommonName: host,
|
|
},
|
|
NotBefore: now.Add(-time.Hour * 24),
|
|
NotAfter: validUntil,
|
|
|
|
KeyUsage: x509.KeyUsageKeyEncipherment |
|
|
x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
|
|
IsCA: true, // so can sign self.
|
|
BasicConstraintsValid: true,
|
|
|
|
DNSNames: dnsNames,
|
|
IPAddresses: ipAddresses,
|
|
}
|
|
|
|
derBytes, err := x509.CreateCertificate(rand.Reader, &template,
|
|
&template, &priv.PublicKey, priv)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to create certificate: %v", err)
|
|
}
|
|
|
|
certBuf := &bytes.Buffer{}
|
|
err = pem.Encode(certBuf, &pem.Block{Type: "CERTIFICATE",
|
|
Bytes: derBytes})
|
|
if err != nil {
|
|
return fmt.Errorf("failed to encode certificate: %v", err)
|
|
}
|
|
|
|
keybytes, err := x509.MarshalECPrivateKey(priv)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to encode privkey: %v", err)
|
|
}
|
|
keyBuf := &bytes.Buffer{}
|
|
err = pem.Encode(keyBuf, &pem.Block{Type: "EC PRIVATE KEY",
|
|
Bytes: keybytes})
|
|
if err != nil {
|
|
return fmt.Errorf("failed to encode private key: %v", err)
|
|
}
|
|
|
|
// Write cert and key files.
|
|
if err = ioutil.WriteFile(certFile, certBuf.Bytes(), 0644); err != nil {
|
|
return err
|
|
}
|
|
if err = ioutil.WriteFile(keyFile, keyBuf.Bytes(), 0600); err != nil {
|
|
os.Remove(certFile)
|
|
return err
|
|
}
|
|
|
|
rpcsLog.Infof("Done generating TLS certificates")
|
|
return nil
|
|
}
|
|
|
|
// genMacaroons generates three macaroon files; one admin-level, one
|
|
// for invoice access and one read-only. These can also be used
|
|
// to generate more granular macaroons.
|
|
func genMacaroons(ctx context.Context, svc *macaroons.Service,
|
|
admFile, roFile, invoiceFile string) error {
|
|
|
|
// First, we'll generate a macaroon that only allows the caller to
|
|
// access invoice related calls. This is useful for merchants and other
|
|
// services to allow an isolated instance that can only query and
|
|
// modify invoices.
|
|
invoiceMac, err := svc.Oven.NewMacaroon(
|
|
ctx, bakery.LatestVersion, nil, invoicePermissions...,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
invoiceMacBytes, err := invoiceMac.M().MarshalBinary()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = ioutil.WriteFile(invoiceFile, invoiceMacBytes, 0644)
|
|
if err != nil {
|
|
os.Remove(invoiceFile)
|
|
return err
|
|
}
|
|
|
|
// Generate the read-only macaroon and write it to a file.
|
|
roMacaroon, err := svc.Oven.NewMacaroon(
|
|
ctx, bakery.LatestVersion, nil, readPermissions...,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
roBytes, err := roMacaroon.M().MarshalBinary()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err = ioutil.WriteFile(roFile, roBytes, 0644); err != nil {
|
|
os.Remove(admFile)
|
|
return err
|
|
}
|
|
|
|
// Generate the admin macaroon and write it to a file.
|
|
adminPermissions := append(readPermissions, writePermissions...)
|
|
admMacaroon, err := svc.Oven.NewMacaroon(
|
|
ctx, bakery.LatestVersion, nil, adminPermissions...,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
admBytes, err := admMacaroon.M().MarshalBinary()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err = ioutil.WriteFile(admFile, admBytes, 0600); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// WalletUnlockParams holds the variables used to parameterize the unlocking of
|
|
// lnd's wallet after it has already been created.
|
|
type WalletUnlockParams struct {
|
|
// Password is the public and private wallet passphrase.
|
|
Password []byte
|
|
|
|
// Birthday specifies the approximate time that this wallet was created.
|
|
// This is used to bound any rescans on startup.
|
|
Birthday time.Time
|
|
|
|
// RecoveryWindow specifies the address lookahead when entering recovery
|
|
// mode. A recovery will be attempted if this value is non-zero.
|
|
RecoveryWindow uint32
|
|
}
|
|
|
|
// waitForWalletPassword will spin up gRPC and REST endpoints for the
|
|
// WalletUnlocker server, and block until a password is provided by
|
|
// the user to this RPC server.
|
|
func waitForWalletPassword(grpcEndpoints, restEndpoints []string,
|
|
serverOpts []grpc.ServerOption, proxyOpts []grpc.DialOption,
|
|
tlsConf *tls.Config) (*WalletUnlockParams, error) {
|
|
|
|
// Set up a new PasswordService, which will listen for passwords
|
|
// provided over RPC.
|
|
grpcServer := grpc.NewServer(serverOpts...)
|
|
|
|
chainConfig := cfg.Bitcoin
|
|
if registeredChains.PrimaryChain() == litecoinChain {
|
|
chainConfig = cfg.Litecoin
|
|
}
|
|
|
|
// The macaroon files are passed to the wallet unlocker since they are
|
|
// also encrypted with the wallet's password. These files will be
|
|
// deleted within it and recreated when successfully changing the
|
|
// wallet's password.
|
|
macaroonFiles := []string{
|
|
filepath.Join(macaroonDatabaseDir, macaroons.DBFilename),
|
|
cfg.AdminMacPath, cfg.ReadMacPath, cfg.InvoiceMacPath,
|
|
}
|
|
pwService := walletunlocker.New(
|
|
chainConfig.ChainDir, activeNetParams.Params, macaroonFiles,
|
|
)
|
|
lnrpc.RegisterWalletUnlockerServer(grpcServer, pwService)
|
|
|
|
// Use a WaitGroup so we can be sure the instructions on how to input the
|
|
// password is the last thing to be printed to the console.
|
|
var wg sync.WaitGroup
|
|
|
|
for _, grpcEndpoint := range grpcEndpoints {
|
|
// Start a gRPC server listening for HTTP/2 connections, solely
|
|
// used for getting the encryption password from the client.
|
|
lis, err := net.Listen("tcp", grpcEndpoint)
|
|
if err != nil {
|
|
ltndLog.Errorf("password RPC server unable to listen on %s",
|
|
grpcEndpoint)
|
|
return nil, err
|
|
}
|
|
defer lis.Close()
|
|
|
|
wg.Add(1)
|
|
go func() {
|
|
rpcsLog.Infof("password RPC server listening on %s", lis.Addr())
|
|
wg.Done()
|
|
grpcServer.Serve(lis)
|
|
}()
|
|
}
|
|
|
|
// Start a REST proxy for our gRPC server above.
|
|
ctx := context.Background()
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
defer cancel()
|
|
|
|
mux := proxy.NewServeMux()
|
|
|
|
err := lnrpc.RegisterWalletUnlockerHandlerFromEndpoint(ctx, mux,
|
|
grpcEndpoints[0], proxyOpts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
srv := &http.Server{Handler: mux}
|
|
|
|
for _, restEndpoint := range restEndpoints {
|
|
lis, err := tls.Listen("tcp", restEndpoint, tlsConf)
|
|
if err != nil {
|
|
ltndLog.Errorf("password gRPC proxy unable to listen on %s",
|
|
restEndpoint)
|
|
return nil, err
|
|
}
|
|
defer lis.Close()
|
|
|
|
wg.Add(1)
|
|
go func() {
|
|
rpcsLog.Infof("password gRPC proxy started at %s", lis.Addr())
|
|
wg.Done()
|
|
srv.Serve(lis)
|
|
}()
|
|
}
|
|
|
|
// Wait for gRPC and REST servers to be up running.
|
|
wg.Wait()
|
|
|
|
// Wait for user to provide the password.
|
|
ltndLog.Infof("Waiting for wallet encryption password. Use `lncli " +
|
|
"create` to create a wallet, `lncli unlock` to unlock an " +
|
|
"existing wallet, or `lncli changepassword` to change the " +
|
|
"password of an existing wallet and unlock it.")
|
|
|
|
// We currently don't distinguish between getting a password to be used
|
|
// for creation or unlocking, as a new wallet db will be created if
|
|
// none exists when creating the chain control.
|
|
select {
|
|
|
|
// The wallet is being created for the first time, we'll check to see
|
|
// if the user provided any entropy for seed creation. If so, then
|
|
// we'll create the wallet early to load the seed.
|
|
case initMsg := <-pwService.InitMsgs:
|
|
password := initMsg.Passphrase
|
|
cipherSeed := initMsg.WalletSeed
|
|
recoveryWindow := initMsg.RecoveryWindow
|
|
|
|
// Before we proceed, we'll check the internal version of the
|
|
// seed. If it's greater than the current key derivation
|
|
// version, then we'll return an error as we don't understand
|
|
// this.
|
|
if cipherSeed.InternalVersion != keychain.KeyDerivationVersion {
|
|
return nil, fmt.Errorf("invalid internal seed version "+
|
|
"%v, current version is %v",
|
|
cipherSeed.InternalVersion,
|
|
keychain.KeyDerivationVersion)
|
|
}
|
|
|
|
netDir := btcwallet.NetworkDir(
|
|
chainConfig.ChainDir, activeNetParams.Params,
|
|
)
|
|
loader := wallet.NewLoader(
|
|
activeNetParams.Params, netDir, uint32(recoveryWindow),
|
|
)
|
|
|
|
// With the seed, we can now use the wallet loader to create
|
|
// the wallet, then unload it so it can be opened shortly
|
|
birthday := cipherSeed.BirthdayTime()
|
|
_, err = loader.CreateNewWallet(
|
|
password, password, cipherSeed.Entropy[:], birthday,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := loader.UnloadWallet(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
walletInitParams := &WalletUnlockParams{
|
|
Password: password,
|
|
Birthday: birthday,
|
|
RecoveryWindow: recoveryWindow,
|
|
}
|
|
|
|
return walletInitParams, nil
|
|
|
|
// The wallet has already been created in the past, and is simply being
|
|
// unlocked. So we'll just return these passphrases.
|
|
case unlockMsg := <-pwService.UnlockMsgs:
|
|
walletInitParams := &WalletUnlockParams{
|
|
Password: unlockMsg.Passphrase,
|
|
RecoveryWindow: unlockMsg.RecoveryWindow,
|
|
}
|
|
return walletInitParams, nil
|
|
|
|
case <-shutdownChannel:
|
|
return nil, fmt.Errorf("shutting down")
|
|
}
|
|
}
|