Merge pull request #5948 from guggero/daemon-error-logging

Fix logging issues, cleanup config parsing

chainreg/chainregistry.go

@@ -53,7 +53,8 @@ type Config struct {
 	// queries if true.
 	HeightHintCacheQueryDisable bool
 
-	// NeutrinoMode defines settings for connecting to a neutrino light-client.
+	// NeutrinoMode defines settings for connecting to a neutrino
+	// light-client.
 	NeutrinoMode *lncfg.Neutrino
 
 	// BitcoindMode defines settings for connecting to a bitcoind node.
@@ -83,8 +84,8 @@ type Config struct {
 	// the main wallet.
 	WalletUnlockParams *walletunlocker.WalletUnlockParams
 
-	// NeutrinoCS is a pointer to a neutrino ChainService. Must be non-nil if
+	// NeutrinoCS is a pointer to a neutrino ChainService. Must be non-nil
-	// using neutrino.
+	// if using neutrino.
 	NeutrinoCS *neutrino.ChainService
 
 	// ActiveNetParams details the current chain we are on.
@@ -152,8 +153,8 @@ const (
 	BtcToLtcConversionRate = 60
 )
 
-// DefaultLtcChannelConstraints is the default set of channel constraints that are
+// DefaultLtcChannelConstraints is the default set of channel constraints that
-// meant to be used when initially funding a Litecoin channel.
+// are meant to be used when initially funding a Litecoin channel.
 var DefaultLtcChannelConstraints = channeldb.ChannelConstraints{
 	DustLimit:        DefaultLitecoinDustLimit,
 	MaxAcceptedHtlcs: input.MaxHTLCNumber / 2,
@@ -285,8 +286,8 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 			DefaultLitecoinStaticFeePerKW, 0,
 		)
 	default:
-		return nil, nil, fmt.Errorf("default routing policy for chain %v is "+
+		return nil, nil, fmt.Errorf("default routing policy for chain "+
-			"unknown", cfg.PrimaryChain())
+			"%v is unknown", cfg.PrimaryChain())
 	}
 
 	var err error
@@ -329,7 +330,8 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 		if cfg.NeutrinoMode.FeeURL != "" {
 			if cfg.FeeURL != "" {
 				return nil, nil, errors.New("feeurl and " +
-					"neutrino.feeurl are mutually exclusive")
+					"neutrino.feeurl are mutually " +
+					"exclusive")
 			}
 
 			cfg.FeeURL = cfg.NeutrinoMode.FeeURL
@@ -414,8 +416,8 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 		}
 
 		if err := bitcoindConn.Start(); err != nil {
-			return nil, nil, fmt.Errorf("unable to connect to bitcoind: "+
+			return nil, nil, fmt.Errorf("unable to connect to "+
-				"%v", err)
+				"bitcoind: %v", err)
 		}
 
 		cc.ChainNotifier = bitcoindnotify.New(
@@ -439,8 +441,8 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 			HTTPPostMode:         true,
 		}
 		if cfg.Bitcoin.Active && !cfg.Bitcoin.RegTest {
-			log.Infof("Initializing bitcoind backed fee estimator in "+
+			log.Infof("Initializing bitcoind backed fee estimator "+
-				"%s mode", bitcoindMode.EstimateMode)
+				"in %s mode", bitcoindMode.EstimateMode)
 
 			// Finally, we'll re-initialize the fee estimator, as
 			// if we're using bitcoind as a backend, then we can
@@ -455,8 +457,9 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 				return nil, nil, err
 			}
 		} else if cfg.Litecoin.Active && !cfg.Litecoin.RegTest {
-			log.Infof("Initializing litecoind backed fee estimator in "+
+			log.Infof("Initializing litecoind backed fee "+
-				"%s mode", bitcoindMode.EstimateMode)
+				"estimator in %s mode",
+				bitcoindMode.EstimateMode)
 
 			// Finally, we'll re-initialize the fee estimator, as
 			// if we're using litecoind as a backend, then we can
@@ -558,8 +561,8 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 			return nil, nil, err
 		}
 
-		// Finally, we'll create an instance of the default chain view to be
+		// Finally, we'll create an instance of the default chain view
-		// used within the routing layer.
+		// to be used within the routing layer.
 		cc.ChainView, err = chainview.NewBtcdFilteredChainView(
 			*rpcConfig, cfg.BlockCache,
 		)
@@ -568,10 +571,12 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 			return nil, nil, err
 		}
 
-		// Create a special websockets rpc client for btcd which will be used
+		// Create a special websockets rpc client for btcd which will be
-		// by the wallet for notifications, calls, etc.
+		// used by the wallet for notifications, calls, etc.
-		chainRPC, err := chain.NewRPCClient(cfg.ActiveNetParams.Params, btcdHost,
+		chainRPC, err := chain.NewRPCClient(
-			btcdUser, btcdPass, rpcCert, false, 20)
+			cfg.ActiveNetParams.Params, btcdHost, btcdUser,
+			btcdPass, rpcCert, false, 20,
+		)
 		if err != nil {
 			return nil, nil, err
 		}
@@ -615,8 +620,8 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 	case cfg.FeeURL == "" && cfg.Bitcoin.MainNet &&
 		homeChainConfig.Node == "neutrino":
 
-		return nil, nil, fmt.Errorf("--feeurl parameter required when " +
+		return nil, nil, fmt.Errorf("--feeurl parameter required " +
-			"running neutrino on mainnet")
+			"when running neutrino on mainnet")
 
 	// Override default fee estimator if an external service is specified.
 	case cfg.FeeURL != "":
@@ -638,7 +643,8 @@ func NewPartialChainControl(cfg *Config) (*PartialChainControl, func(), error) {
 	ccCleanup := func() {
 		if cc.FeeEstimator != nil {
 			if err := cc.FeeEstimator.Stop(); err != nil {
-				log.Errorf("Failed to stop feeEstimator: %v", err)
+				log.Errorf("Failed to stop feeEstimator: %v",
+					err)
 			}
 		}
 	}
@@ -686,12 +692,12 @@ func NewChainControl(walletConfig lnwallet.Config,
 
 	lnWallet, err := lnwallet.NewLightningWallet(walletConfig)
 	if err != nil {
-		fmt.Printf("unable to create wallet: %v\n", err)
+		return nil, ccCleanup, fmt.Errorf("unable to create wallet: %v",
-		return nil, ccCleanup, err
+			err)
 	}
 	if err := lnWallet.Startup(); err != nil {
-		fmt.Printf("unable to start wallet: %v\n", err)
+		return nil, ccCleanup, fmt.Errorf("unable to create wallet: %v",
-		return nil, ccCleanup, err
+			err)
 	}
 
 	log.Info("LightningWallet opened")
@@ -872,7 +878,9 @@ func (c *ChainRegistry) LookupChain(targetChain ChainCode) (
 
 // LookupChainByHash attempts to look up an active ChainControl which
 // corresponds to the passed genesis hash.
-func (c *ChainRegistry) LookupChainByHash(chainHash chainhash.Hash) (*ChainControl, bool) {
+func (c *ChainRegistry) LookupChainByHash(
+	chainHash chainhash.Hash) (*ChainControl, bool) {
+
 	c.RLock()
 	defer c.RUnlock()
 

config.go

@@ -647,15 +647,34 @@ func LoadConfig(interceptor signal.Interceptor) (*Config, error) {
 	}
 
 	// Make sure everything we just loaded makes sense.
-	cleanCfg, err := ValidateConfig(cfg, usageMessage, interceptor,
+	cleanCfg, err := ValidateConfig(
-		fileParser, flagParser)
+		cfg, interceptor, fileParser, flagParser,
+	)
+	if usageErr, ok := err.(*usageError); ok {
+		// The logging system might not yet be initialized, so we also
+		// write to stderr to make sure the error appears somewhere.
+		_, _ = fmt.Fprintln(os.Stderr, usageMessage)
+		ltndLog.Warnf("Incorrect usage: %v", usageMessage)
+
+		// The log subsystem might not yet be initialized. But we still
+		// try to log the error there since some packaging solutions
+		// might only look at the log and not stdout/stderr.
+		ltndLog.Warnf("Error validating config: %v", usageErr.err)
+
+		return nil, usageErr.err
+	}
 	if err != nil {
+		// The log subsystem might not yet be initialized. But we still
+		// try to log the error there since some packaging solutions
+		// might only look at the log and not stdout/stderr.
+		ltndLog.Warnf("Error validating config: %v", err)
+
 		return nil, err
 	}
 
 	// Warn about missing config file only after all other configuration is
-	// done.  This prevents the warning on help messages and invalid
+	// done. This prevents the warning on help messages and invalid options.
-	// options.  Note this should go directly before the return.
+	// Note this should go directly before the return.
 	if configFileError != nil {
 		ltndLog.Warnf("%v", configFileError)
 	}
@@ -663,12 +682,24 @@ func LoadConfig(interceptor signal.Interceptor) (*Config, error) {
 	return cleanCfg, nil
 }
 
+// usageError is an error type that signals a problem with the supplied flags.
+type usageError struct {
+	err error
+}
+
+// Error returns the error string.
+//
+// NOTE: This is part of the error interface.
+func (u *usageError) Error() string {
+	return u.err.Error()
+}
+
 // ValidateConfig check the given configuration to be sane. This makes sure no
 // illegal values or combination of values are set. All file system paths are
 // normalized. The cleaned up config is returned on success.
-func ValidateConfig(cfg Config, usageMessage string,
+func ValidateConfig(cfg Config, interceptor signal.Interceptor, fileParser,
-	interceptor signal.Interceptor, fileParser,
 	flagParser *flags.Parser) (*Config, error) {
+
 	// If the provided lnd directory is not the default, we'll modify the
 	// path to all of the files and directories that will live within it.
 	lndDir := CleanAndExpandPath(cfg.LndDir)
@@ -685,12 +716,16 @@ func ValidateConfig(cfg Config, usageMessage string,
 		// user has not requested a different location, we'll move the
 		// location to be relative to the specified lnd directory.
 		if cfg.Watchtower.TowerDir == defaultTowerDir {
-			cfg.Watchtower.TowerDir =
+			cfg.Watchtower.TowerDir = filepath.Join(
-				filepath.Join(cfg.DataDir, defaultTowerSubDirname)
+				cfg.DataDir, defaultTowerSubDirname,
+			)
 		}
 	}
 
-	funcName := "loadConfig"
+	funcName := "ValidateConfig"
+	mkErr := func(format string, args ...interface{}) error {
+		return fmt.Errorf(funcName+": "+format, args...)
+	}
 	makeDirectory := func(dir string) error {
 		err := os.MkdirAll(dir, 0700)
 		if err != nil {
@@ -705,10 +740,8 @@ func ValidateConfig(cfg Config, usageMessage string,
 				}
 			}
 
-			str := "%s: Failed to create lnd directory: %v"
+			str := "Failed to create lnd directory '%s': %v"
-			err := fmt.Errorf(str, funcName, err)
+			return mkErr(str, dir, err)
-			_, _ = fmt.Fprintln(os.Stderr, err)
-			return err
 		}
 
 		return nil
@@ -716,21 +749,17 @@ func ValidateConfig(cfg Config, usageMessage string,
 
 	// IsSet returns true if an option has been set in either the config
 	// file or by a flag.
-	isSet := func(field string) bool {
+	isSet := func(field string) (bool, error) {
 		fieldName, ok := reflect.TypeOf(Config{}).FieldByName(field)
 		if !ok {
-			str := "%s: could not find field %s"
+			str := "could not find field %s"
-			err := fmt.Errorf(str, funcName, field)
+			return false, mkErr(str, field)
-			_, _ = fmt.Fprintln(os.Stderr, err)
-			return false
 		}
 
 		long, ok := fieldName.Tag.Lookup("long")
 		if !ok {
-			str := "%s: field %s does not have a long tag"
+			str := "field %s does not have a long tag"
-			err := fmt.Errorf(str, funcName, field)
+			return false, mkErr(str, field)
-			_, _ = fmt.Fprintln(os.Stderr, err)
-			return false
 		}
 
 		// The user has the option to set the flag in either the config
@@ -753,7 +782,8 @@ func ValidateConfig(cfg Config, usageMessage string,
 		return (fileOption != nil && fileOption.IsSet()) ||
 				(fileOptionNested != nil && fileOptionNested.IsSet()) ||
 				(flagOption != nil && flagOption.IsSet()) ||
-			(flagOptionNested != nil && flagOptionNested.IsSet())
+				(flagOptionNested != nil && flagOptionNested.IsSet()),
+			nil
 	}
 
 	// As soon as we're done parsing configuration options, ensure all paths
@@ -779,61 +809,31 @@ func ValidateConfig(cfg Config, usageMessage string,
 		cfg.WalletUnlockPasswordFile,
 	)
 
-	// Create the lnd directory and all other sub directories if they don't
-	// already exist. This makes sure that directory trees are also created
-	// for files that point to outside of the lnddir.
-	dirs := []string{
-		lndDir, cfg.DataDir,
-		cfg.LetsEncryptDir, cfg.Watchtower.TowerDir,
-		filepath.Dir(cfg.TLSCertPath), filepath.Dir(cfg.TLSKeyPath),
-		filepath.Dir(cfg.AdminMacPath), filepath.Dir(cfg.ReadMacPath),
-		filepath.Dir(cfg.InvoiceMacPath),
-		filepath.Dir(cfg.Tor.PrivateKeyPath),
-		filepath.Dir(cfg.Tor.WatchtowerKeyPath),
-	}
-	for _, dir := range dirs {
-		if err := makeDirectory(dir); err != nil {
-			return nil, err
-		}
-	}
-
 	// Ensure that the user didn't attempt to specify negative values for
 	// any of the autopilot params.
 	if cfg.Autopilot.MaxChannels < 0 {
-		str := "%s: autopilot.maxchannels must be non-negative"
+		str := "autopilot.maxchannels must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 	if cfg.Autopilot.Allocation < 0 {
-		str := "%s: autopilot.allocation must be non-negative"
+		str := "autopilot.allocation must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 	if cfg.Autopilot.MinChannelSize < 0 {
-		str := "%s: autopilot.minchansize must be non-negative"
+		str := "autopilot.minchansize must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 	if cfg.Autopilot.MaxChannelSize < 0 {
-		str := "%s: autopilot.maxchansize must be non-negative"
+		str := "autopilot.maxchansize must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 	if cfg.Autopilot.MinConfs < 0 {
-		str := "%s: autopilot.minconfs must be non-negative"
+		str := "autopilot.minconfs must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 	if cfg.Autopilot.ConfTarget < 1 {
-		str := "%s: autopilot.conftarget must be positive"
+		str := "autopilot.conftarget must be positive"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 
 	// Ensure that the specified values for the min and max channel size
@@ -846,7 +846,7 @@ func ValidateConfig(cfg Config, usageMessage string,
 	}
 
 	if _, err := validateAtplCfg(cfg.Autopilot); err != nil {
-		return nil, err
+		return nil, mkErr("error validating autopilot: %v", err)
 	}
 
 	// Ensure that --maxchansize is properly handled when set by user.
@@ -865,32 +865,33 @@ func ValidateConfig(cfg Config, usageMessage string,
 	// Ensure that the user specified values for the min and max channel
 	// size make sense.
 	if cfg.MaxChanSize < cfg.MinChanSize {
-		return nil, fmt.Errorf("invalid channel size parameters: "+
+		return nil, mkErr("invalid channel size parameters: "+
-			"max channel size %v, must be no less than min chan size %v",
+			"max channel size %v, must be no less than min chan "+
-			cfg.MaxChanSize, cfg.MinChanSize,
+			"size %v", cfg.MaxChanSize, cfg.MinChanSize,
 		)
 	}
 
 	// Don't allow superflous --maxchansize greater than
 	// BOLT 02 soft-limit for non-wumbo channel
-	if !cfg.ProtocolOptions.Wumbo() && cfg.MaxChanSize > int64(MaxFundingAmount) {
+	if !cfg.ProtocolOptions.Wumbo() &&
-		return nil, fmt.Errorf("invalid channel size parameters: "+
+		cfg.MaxChanSize > int64(MaxFundingAmount) {
-			"maximum channel size %v is greater than maximum non-wumbo"+
+
-			" channel size %v",
+		return nil, mkErr("invalid channel size parameters: "+
-			cfg.MaxChanSize, MaxFundingAmount,
+			"maximum channel size %v is greater than maximum "+
+			"non-wumbo channel size %v", cfg.MaxChanSize,
+			MaxFundingAmount,
 		)
 	}
 
 	// Ensure a valid max channel fee allocation was set.
 	if cfg.MaxChannelFeeAllocation <= 0 || cfg.MaxChannelFeeAllocation > 1 {
-		return nil, fmt.Errorf("invalid max channel fee allocation: "+
+		return nil, mkErr("invalid max channel fee allocation: %v, "+
-			"%v, must be within (0, 1]",
+			"must be within (0, 1]", cfg.MaxChannelFeeAllocation)
-			cfg.MaxChannelFeeAllocation)
 	}
 
 	if cfg.MaxCommitFeeRateAnchors < 1 {
-		return nil, fmt.Errorf("invalid max commit fee rate anchors: "+
+		return nil, mkErr("invalid max commit fee rate anchors: %v, "+
-			"%v, must be at least 1 sat/vbyte",
+			"must be at least 1 sat/vByte",
 			cfg.MaxCommitFeeRateAnchors)
 	}
 
@@ -912,7 +913,7 @@ func ValidateConfig(cfg Config, usageMessage string,
 			cfg.net.ResolveTCPAddr,
 		)
 		if err != nil {
-			return nil, err
+			return nil, mkErr("error parsing tor dns: %v", err)
 		}
 		cfg.Tor.DNS = dns.String()
 	}
@@ -922,25 +923,24 @@ func ValidateConfig(cfg Config, usageMessage string,
 		cfg.net.ResolveTCPAddr,
 	)
 	if err != nil {
-		return nil, err
+		return nil, mkErr("error parsing tor control address: %v", err)
 	}
 	cfg.Tor.Control = control.String()
 
 	// Ensure that tor socks host:port is not equal to tor control
 	// host:port. This would lead to lnd not starting up properly.
 	if cfg.Tor.SOCKS == cfg.Tor.Control {
-		str := "%s: tor.socks and tor.control can not use " +
+		str := "tor.socks and tor.control can not us the same host:port"
-			"the same host:port"
+		return nil, mkErr(str)
-		return nil, fmt.Errorf(str, funcName)
 	}
 
 	switch {
 	case cfg.Tor.V2 && cfg.Tor.V3:
-		return nil, errors.New("either tor.v2 or tor.v3 can be set, " +
+		return nil, mkErr("either tor.v2 or tor.v3 can be set, " +
 			"but not both")
 	case cfg.DisableListen && (cfg.Tor.V2 || cfg.Tor.V3):
-		return nil, errors.New("listening must be enabled when " +
+		return nil, mkErr("listening must be enabled when enabling " +
-			"enabling inbound connections over Tor")
+			"inbound connections over Tor")
 	}
 
 	if cfg.Tor.PrivateKeyPath == "" {
@@ -960,11 +960,13 @@ func ValidateConfig(cfg Config, usageMessage string,
 		switch {
 		case cfg.Tor.V2:
 			cfg.Tor.WatchtowerKeyPath = filepath.Join(
-				cfg.Watchtower.TowerDir, defaultTorV2PrivateKeyFilename,
+				cfg.Watchtower.TowerDir,
+				defaultTorV2PrivateKeyFilename,
 			)
 		case cfg.Tor.V3:
 			cfg.Tor.WatchtowerKeyPath = filepath.Join(
-				cfg.Watchtower.TowerDir, defaultTorV3PrivateKeyFilename,
+				cfg.Watchtower.TowerDir,
+				defaultTorV3PrivateKeyFilename,
 			)
 		}
 	}
@@ -984,11 +986,11 @@ func ValidateConfig(cfg Config, usageMessage string,
 	}
 
 	if cfg.DisableListen && cfg.NAT {
-		return nil, errors.New("NAT traversal cannot be used when " +
+		return nil, mkErr("NAT traversal cannot be used when " +
 			"listening is disabled")
 	}
 	if cfg.NAT && len(cfg.ExternalHosts) != 0 {
-		return nil, errors.New("NAT support and externalhosts are " +
+		return nil, mkErr("NAT support and externalhosts are " +
 			"mutually exclusive, only one should be selected")
 	}
 
@@ -996,20 +998,22 @@ func ValidateConfig(cfg Config, usageMessage string,
 	switch {
 	// At this moment, multiple active chains are not supported.
 	case cfg.Litecoin.Active && cfg.Bitcoin.Active:
-		str := "%s: Currently both Bitcoin and Litecoin cannot be " +
+		str := "Currently both Bitcoin and Litecoin cannot be " +
 			"active together"
-		return nil, fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
 
 	// Either Bitcoin must be active, or Litecoin must be active.
 	// Otherwise, we don't know which chain we're on.
 	case !cfg.Bitcoin.Active && !cfg.Litecoin.Active:
-		return nil, fmt.Errorf("%s: either bitcoin.active or "+
+		return nil, mkErr("either bitcoin.active or " +
-			"litecoin.active must be set to 1 (true)", funcName)
+			"litecoin.active must be set to 1 (true)")
 
 	case cfg.Litecoin.Active:
-		err := cfg.Litecoin.Validate(minTimeLockDelta, funding.MinLtcRemoteDelay)
+		err := cfg.Litecoin.Validate(
+			minTimeLockDelta, funding.MinLtcRemoteDelay,
+		)
 		if err != nil {
-			return nil, err
+			return nil, mkErr("error validating litecoin: %v", err)
 		}
 
 		// Multiple networks can't be selected simultaneously.  Count
@@ -1034,25 +1038,22 @@ func ValidateConfig(cfg Config, usageMessage string,
 			ltcParams = chainreg.LitecoinSimNetParams
 		}
 		if cfg.Litecoin.SigNet {
-			return nil, fmt.Errorf("%s: litecoin.signet is not "+
+			return nil, mkErr("litecoin.signet is not supported")
-				"supported", funcName)
 		}
 
 		if numNets > 1 {
-			str := "%s: The mainnet, testnet, and simnet params " +
+			str := "The mainnet, testnet, and simnet params " +
 				"can't be used together -- choose one of the " +
 				"three"
-			err := fmt.Errorf(str, funcName)
+			return nil, mkErr(str)
-			return nil, err
 		}
 
 		// The target network must be provided, otherwise, we won't
 		// know how to initialize the daemon.
 		if numNets == 0 {
-			str := "%s: either --litecoin.mainnet, or " +
+			str := "either --litecoin.mainnet, or " +
 				"litecoin.testnet must be specified"
-			err := fmt.Errorf(str, funcName)
+			return nil, mkErr(str)
-			return nil, err
 		}
 
 		// The litecoin chain is the current active chain. However
@@ -1063,36 +1064,39 @@ func ValidateConfig(cfg Config, usageMessage string,
 
 		switch cfg.Litecoin.Node {
 		case "ltcd":
-			err := parseRPCParams(cfg.Litecoin, cfg.LtcdMode,
+			err := parseRPCParams(
-				chainreg.LitecoinChain, funcName, cfg.ActiveNetParams)
+				cfg.Litecoin, cfg.LtcdMode,
+				chainreg.LitecoinChain, cfg.ActiveNetParams,
+			)
 			if err != nil {
-				err := fmt.Errorf("unable to load RPC "+
+				return nil, mkErr("unable to load RPC "+
 					"credentials for ltcd: %v", err)
-				return nil, err
 			}
 		case "litecoind":
 			if cfg.Litecoin.SimNet {
-				return nil, fmt.Errorf("%s: litecoind does not "+
+				return nil, mkErr("litecoind does not " +
-					"support simnet", funcName)
+					"support simnet")
 			}
-			err := parseRPCParams(cfg.Litecoin, cfg.LitecoindMode,
+			err := parseRPCParams(
-				chainreg.LitecoinChain, funcName, cfg.ActiveNetParams)
+				cfg.Litecoin, cfg.LitecoindMode,
+				chainreg.LitecoinChain, cfg.ActiveNetParams,
+			)
 			if err != nil {
-				err := fmt.Errorf("unable to load RPC "+
+				return nil, mkErr("unable to load RPC "+
 					"credentials for litecoind: %v", err)
-				return nil, err
 			}
 		default:
-			str := "%s: only ltcd and litecoind mode supported for " +
+			str := "only ltcd and litecoind mode supported for " +
 				"litecoin at this time"
-			return nil, fmt.Errorf(str, funcName)
+			return nil, mkErr(str)
 		}
 
-		cfg.Litecoin.ChainDir = filepath.Join(cfg.DataDir,
+		cfg.Litecoin.ChainDir = filepath.Join(
-			defaultChainSubDirname,
+			cfg.DataDir, defaultChainSubDirname,
-			chainreg.LitecoinChain.String())
+			chainreg.LitecoinChain.String(),
+		)
 
-		// Finally we'll register the litecoin chain as our current
+		// Finally, we'll register the litecoin chain as our current
 		// primary chain.
 		cfg.registeredChains.RegisterPrimaryChain(chainreg.LitecoinChain)
 		MaxFundingAmount = funding.MaxLtcFundingAmount
@@ -1133,9 +1137,9 @@ func ValidateConfig(cfg Config, usageMessage string,
 					cfg.Bitcoin.SigNetChallenge,
 				)
 				if err != nil {
-					return nil, fmt.Errorf("%s: Invalid "+
+					return nil, mkErr("Invalid "+
 						"signet challenge, hex decode "+
-						"failed: %v", funcName, err)
+						"failed: %v", err)
 				}
 				sigNetChallenge = challenge
 			}
@@ -1158,66 +1162,66 @@ func ValidateConfig(cfg Config, usageMessage string,
 			cfg.ActiveNetParams.Params = &chainParams
 		}
 		if numNets > 1 {
-			str := "%s: The mainnet, testnet, regtest, and " +
+			str := "The mainnet, testnet, regtest, and simnet " +
-				"simnet params can't be used together -- " +
+				"params can't be used together -- choose one " +
-				"choose one of the four"
+				"of the four"
-			err := fmt.Errorf(str, funcName)
+			return nil, mkErr(str)
-			return nil, err
 		}
 
 		// The target network must be provided, otherwise, we won't
 		// know how to initialize the daemon.
 		if numNets == 0 {
-			str := "%s: either --bitcoin.mainnet, or " +
+			str := "either --bitcoin.mainnet, or bitcoin.testnet," +
-				"bitcoin.testnet, bitcoin.simnet, or bitcoin.regtest " +
+				"bitcoin.simnet, or bitcoin.regtest " +
 				"must be specified"
-			err := fmt.Errorf(str, funcName)
+			return nil, mkErr(str)
-			return nil, err
 		}
 
-		err := cfg.Bitcoin.Validate(minTimeLockDelta, funding.MinBtcRemoteDelay)
+		err := cfg.Bitcoin.Validate(
+			minTimeLockDelta, funding.MinBtcRemoteDelay,
+		)
 		if err != nil {
-			return nil, err
+			return nil, mkErr("error validating bitcoin params: %v",
+				err)
 		}
 
 		switch cfg.Bitcoin.Node {
 		case "btcd":
 			err := parseRPCParams(
-				cfg.Bitcoin, cfg.BtcdMode, chainreg.BitcoinChain, funcName,
+				cfg.Bitcoin, cfg.BtcdMode,
-				cfg.ActiveNetParams,
+				chainreg.BitcoinChain, cfg.ActiveNetParams,
 			)
 			if err != nil {
-				err := fmt.Errorf("unable to load RPC "+
+				return nil, mkErr("unable to load RPC "+
 					"credentials for btcd: %v", err)
-				return nil, err
 			}
 		case "bitcoind":
 			if cfg.Bitcoin.SimNet {
-				return nil, fmt.Errorf("%s: bitcoind does not "+
+				return nil, mkErr("bitcoind does not " +
-					"support simnet", funcName)
+					"support simnet")
 			}
 
 			err := parseRPCParams(
-				cfg.Bitcoin, cfg.BitcoindMode, chainreg.BitcoinChain, funcName,
+				cfg.Bitcoin, cfg.BitcoindMode,
-				cfg.ActiveNetParams,
+				chainreg.BitcoinChain, cfg.ActiveNetParams,
 			)
 			if err != nil {
-				err := fmt.Errorf("unable to load RPC "+
+				return nil, mkErr("unable to load RPC "+
 					"credentials for bitcoind: %v", err)
-				return nil, err
 			}
 		case "neutrino":
 			// No need to get RPC parameters.
 
 		default:
-			str := "%s: only btcd, bitcoind, and neutrino mode " +
+			str := "only btcd, bitcoind, and neutrino mode " +
 				"supported for bitcoin at this time"
-			return nil, fmt.Errorf(str, funcName)
+			return nil, mkErr(str)
 		}
 
-		cfg.Bitcoin.ChainDir = filepath.Join(cfg.DataDir,
+		cfg.Bitcoin.ChainDir = filepath.Join(
-			defaultChainSubDirname,
+			cfg.DataDir, defaultChainSubDirname,
-			chainreg.BitcoinChain.String())
+			chainreg.BitcoinChain.String(),
+		)
 
 		// Finally we'll register the bitcoin chain as our current
 		// primary chain.
@@ -1227,28 +1231,20 @@ func ValidateConfig(cfg Config, usageMessage string,
 	// Ensure that the user didn't attempt to specify negative values for
 	// any of the autopilot params.
 	if cfg.Autopilot.MaxChannels < 0 {
-		str := "%s: autopilot.maxchannels must be non-negative"
+		str := "autopilot.maxchannels must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 	if cfg.Autopilot.Allocation < 0 {
-		str := "%s: autopilot.allocation must be non-negative"
+		str := "autopilot.allocation must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 	if cfg.Autopilot.MinChannelSize < 0 {
-		str := "%s: autopilot.minchansize must be non-negative"
+		str := "autopilot.minchansize must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 	if cfg.Autopilot.MaxChannelSize < 0 {
-		str := "%s: autopilot.maxchansize must be non-negative"
+		str := "autopilot.maxchansize must be non-negative"
-		err := fmt.Errorf(str, funcName)
+		return nil, mkErr(str)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 
 	// Ensure that the specified values for the min and max channel size
@@ -1270,19 +1266,13 @@ func ValidateConfig(cfg Config, usageMessage string,
 			// Determine if the port is valid.
 			profilePort, err := strconv.Atoi(hostPort)
 			if err != nil || profilePort < 1024 || profilePort > 65535 {
-				err = fmt.Errorf(str, funcName)
+				return nil, &usageError{mkErr(str)}
-				_, _ = fmt.Fprintln(os.Stderr, err)
-				_, _ = fmt.Fprintln(os.Stderr, usageMessage)
-				return nil, err
 			}
 		} else {
 			// Try to parse Profile as a port.
 			profilePort, err := strconv.Atoi(cfg.Profile)
 			if err != nil || profilePort < 1024 || profilePort > 65535 {
-				err = fmt.Errorf(str, funcName)
+				return nil, &usageError{mkErr(str)}
-				_, _ = fmt.Fprintln(os.Stderr, err)
-				_, _ = fmt.Fprintln(os.Stderr, usageMessage)
-				return nil, err
 			}
 
 			// Since the user just set a port, we will serve debugging
@@ -1299,12 +1289,6 @@ func ValidateConfig(cfg Config, usageMessage string,
 		lncfg.NormalizeNetwork(cfg.ActiveNetParams.Name),
 	)
 
-	// We need to make sure the default network directory exists for when we
-	// try to create our default macaroons there.
-	if err := makeDirectory(cfg.networkDir); err != nil {
-		return nil, err
-	}
-
 	// If a custom macaroon directory wasn't specified and the data
 	// directory has changed from the default path, then we'll also update
 	// the path for the macaroons to be generated.
@@ -1324,6 +1308,24 @@ func ValidateConfig(cfg Config, usageMessage string,
 		)
 	}
 
+	// Create the lnd directory and all other sub-directories if they don't
+	// already exist. This makes sure that directory trees are also created
+	// for files that point to outside the lnddir.
+	dirs := []string{
+		lndDir, cfg.DataDir, cfg.networkDir,
+		cfg.LetsEncryptDir, cfg.Watchtower.TowerDir,
+		filepath.Dir(cfg.TLSCertPath), filepath.Dir(cfg.TLSKeyPath),
+		filepath.Dir(cfg.AdminMacPath), filepath.Dir(cfg.ReadMacPath),
+		filepath.Dir(cfg.InvoiceMacPath),
+		filepath.Dir(cfg.Tor.PrivateKeyPath),
+		filepath.Dir(cfg.Tor.WatchtowerKeyPath),
+	}
+	for _, dir := range dirs {
+		if err := makeDirectory(dir); err != nil {
+			return nil, err
+		}
+	}
+
 	// Similarly, if a custom back up file path wasn't specified, then
 	// we'll update the file location to match our set network directory.
 	if cfg.BackupFilePath == "" {
@@ -1334,14 +1336,15 @@ func ValidateConfig(cfg Config, usageMessage string,
 
 	// Append the network type to the log directory so it is "namespaced"
 	// per network in the same fashion as the data directory.
-	cfg.LogDir = filepath.Join(cfg.LogDir,
+	cfg.LogDir = filepath.Join(
-		cfg.registeredChains.PrimaryChain().String(),
+		cfg.LogDir, cfg.registeredChains.PrimaryChain().String(),
-		lncfg.NormalizeNetwork(cfg.ActiveNetParams.Name))
+		lncfg.NormalizeNetwork(cfg.ActiveNetParams.Name),
+	)
 
 	// A log writer must be passed in, otherwise we can't function and would
 	// run into a panic later on.
 	if cfg.LogWriter == nil {
-		return nil, fmt.Errorf("log writer missing in config")
+		return nil, mkErr("log writer missing in config")
 	}
 
 	// Special show command to list supported subsystems and exit.
@@ -1358,19 +1361,15 @@ func ValidateConfig(cfg Config, usageMessage string,
 		cfg.MaxLogFileSize, cfg.MaxLogFiles,
 	)
 	if err != nil {
-		str := "%s: log rotation setup failed: %v"
+		str := "log rotation setup failed: %v"
-		err = fmt.Errorf(str, funcName, err.Error())
+		return nil, mkErr(str, err)
-		_, _ = fmt.Fprintln(os.Stderr, err)
-		return nil, err
 	}
 
 	// Parse, validate, and set debug log level(s).
 	err = build.ParseAndSetDebugLevels(cfg.DebugLevel, cfg.LogWriter)
 	if err != nil {
-		err = fmt.Errorf("%s: %v", funcName, err.Error())
+		str := "error parsing debug level: %v"
-		_, _ = fmt.Fprintln(os.Stderr, err)
+		return nil, &usageError{mkErr(str, err)}
-		_, _ = fmt.Fprintln(os.Stderr, usageMessage)
-		return nil, err
 	}
 
 	// At least one RPCListener is required. So listen on localhost per
@@ -1406,7 +1405,7 @@ func ValidateConfig(cfg Config, usageMessage string,
 		cfg.net.ResolveTCPAddr,
 	)
 	if err != nil {
-		return nil, err
+		return nil, mkErr("error normalizing RPC listen addrs: %v", err)
 	}
 
 	// Add default port to all REST listener addresses if needed and remove
@@ -1416,25 +1415,25 @@ func ValidateConfig(cfg Config, usageMessage string,
 		cfg.net.ResolveTCPAddr,
 	)
 	if err != nil {
-		return nil, err
+		return nil, mkErr("error normalizing REST listen addrs: %v", err)
 	}
 
 	switch {
 	// The no seed backup and auto unlock are mutually exclusive.
 	case cfg.NoSeedBackup && cfg.WalletUnlockPasswordFile != "":
-		return nil, fmt.Errorf("cannot set noseedbackup and " +
+		return nil, mkErr("cannot set noseedbackup and " +
 			"wallet-unlock-password-file at the same time")
 
 	// The "allow-create" flag cannot be set without the auto unlock file.
 	case cfg.WalletUnlockAllowCreate && cfg.WalletUnlockPasswordFile == "":
-		return nil, fmt.Errorf("cannot set wallet-unlock-allow-create " +
+		return nil, mkErr("cannot set wallet-unlock-allow-create " +
 			"without wallet-unlock-password-file")
 
 	// If a password file was specified, we need it to exist.
 	case cfg.WalletUnlockPasswordFile != "" &&
 		!lnrpc.FileExists(cfg.WalletUnlockPasswordFile):
 
-		return nil, fmt.Errorf("wallet unlock password file %s does "+
+		return nil, mkErr("wallet unlock password file %s does "+
 			"not exist", cfg.WalletUnlockPasswordFile)
 	}
 
@@ -1446,7 +1445,8 @@ func ValidateConfig(cfg Config, usageMessage string,
 		cfg.RPCListeners, !cfg.NoMacaroons, true,
 	)
 	if err != nil {
-		return nil, err
+		return nil, mkErr("error enforcing safe authentication on "+
+			"RPC ports: %v", err)
 	}
 
 	if cfg.DisableRest {
@@ -1457,7 +1457,8 @@ func ValidateConfig(cfg Config, usageMessage string,
 			cfg.RESTListeners, !cfg.NoMacaroons, !cfg.DisableRestTLS,
 		)
 		if err != nil {
-			return nil, err
+			return nil, mkErr("error enforcing safe "+
+				"authentication on REST ports: %v", err)
 		}
 	}
 
@@ -1475,7 +1476,8 @@ func ValidateConfig(cfg Config, usageMessage string,
 			cfg.net.ResolveTCPAddr,
 		)
 		if err != nil {
-			return nil, err
+			return nil, mkErr("error normalizing p2p listen "+
+				"addrs: %v", err)
 		}
 
 		// Add default port to all external IP addresses if needed and remove
@@ -1493,10 +1495,9 @@ func ValidateConfig(cfg Config, usageMessage string,
 		// that.
 		for _, p2pListener := range cfg.Listeners {
 			if lncfg.IsUnix(p2pListener) {
-				err := fmt.Errorf("unix socket addresses cannot be "+
+				return nil, mkErr("unix socket addresses "+
-					"used for the p2p connection listener: %s",
+					"cannot be used for the p2p "+
-					p2pListener)
+					"connection listener: %s", p2pListener)
-				return nil, err
 			}
 		}
 	}
@@ -1504,15 +1505,18 @@ func ValidateConfig(cfg Config, usageMessage string,
 	// Ensure that the specified minimum backoff is below or equal to the
 	// maximum backoff.
 	if cfg.MinBackoff > cfg.MaxBackoff {
-		return nil, fmt.Errorf("maxbackoff must be greater than " +
+		return nil, mkErr("maxbackoff must be greater than minbackoff")
-			"minbackoff")
 	}
 
 	// Newer versions of lnd added a new sub-config for bolt-specific
-	// parameters. However we want to also allow existing users to use the
+	// parameters. However, we want to also allow existing users to use the
 	// value on the top-level config. If the outer config value is set,
 	// then we'll use that directly.
-	if isSet("SyncFreelist") {
+	flagSet, err := isSet("SyncFreelist")
+	if err != nil {
+		return nil, mkErr("error parsing freelist sync flag: %v", err)
+	}
+	if flagSet {
 		cfg.DB.Bolt.NoFreelistSync = !cfg.SyncFreelist
 	}
 
@@ -1520,13 +1524,13 @@ func ValidateConfig(cfg Config, usageMessage string,
 	// than the protocol maximum.
 	maxRemoteHtlcs := uint16(input.MaxHTLCNumber / 2)
 	if cfg.DefaultRemoteMaxHtlcs > maxRemoteHtlcs {
-		return nil, fmt.Errorf("default-remote-max-htlcs (%v) must be "+
+		return nil, mkErr("default-remote-max-htlcs (%v) must be "+
 			"less than %v", cfg.DefaultRemoteMaxHtlcs,
 			maxRemoteHtlcs)
 	}
 
 	if err := cfg.Gossip.Parse(); err != nil {
-		return nil, err
+		return nil, mkErr("error parsing gossip syncer: %v", err)
 	}
 
 	// Log a warning if our expiry delta is not greater than our incoming
@@ -1560,11 +1564,11 @@ func ValidateConfig(cfg Config, usageMessage string,
 	// the wallet.
 	_, err = parseHexColor(cfg.Color)
 	if err != nil {
-		return nil, fmt.Errorf("unable to parse node color: %v", err)
+		return nil, mkErr("unable to parse node color: %v", err)
 	}
 
 	// All good, return the sanitized result.
-	return &cfg, err
+	return &cfg, nil
 }
 
 // graphDatabaseDir returns the default directory where the local bolt graph db
@@ -1636,8 +1640,7 @@ func CleanAndExpandPath(path string) string {
 }
 
 func parseRPCParams(cConfig *lncfg.Chain, nodeConfig interface{},
-	net chainreg.ChainCode, funcName string,
+	net chainreg.ChainCode, netParams chainreg.BitcoinNetParams) error {
-	netParams chainreg.BitcoinNetParams) error { // nolint:unparam
 
 	// First, we'll check our node config to make sure the RPC parameters
 	// were set correctly. We'll also determine the path to the conf file
@@ -1726,9 +1729,8 @@ func parseRPCParams(cConfig *lncfg.Chain, nodeConfig interface{},
 	// the RPC credentials from the configuration. So if lnd wasn't
 	// specified the parameters, then we won't be able to start.
 	if cConfig.SimNet {
-		str := "%v: rpcuser and rpcpass must be set to your btcd " +
+		return fmt.Errorf("rpcuser and rpcpass must be set to your " +
-			"node's RPC parameters for simnet mode"
+			"btcd node's RPC parameters for simnet mode")
-		return fmt.Errorf(str, funcName)
 	}
 
 	fmt.Println("Attempting automatic RPC configuration to " + daemonName)
@@ -1739,19 +1741,18 @@ func parseRPCParams(cConfig *lncfg.Chain, nodeConfig interface{},
 		nConf := nodeConfig.(*lncfg.Btcd)
 		rpcUser, rpcPass, err := extractBtcdRPCParams(confFile)
 		if err != nil {
-			return fmt.Errorf("unable to extract RPC credentials:"+
+			return fmt.Errorf("unable to extract RPC credentials: "+
-				" %v, cannot start w/o RPC connection",
+				"%v, cannot start w/o RPC connection", err)
-				err)
 		}
 		nConf.RPCUser, nConf.RPCPass = rpcUser, rpcPass
+
 	case "bitcoind", "litecoind":
 		nConf := nodeConfig.(*lncfg.Bitcoind)
 		rpcUser, rpcPass, zmqBlockHost, zmqTxHost, err :=
 			extractBitcoindRPCParams(netParams.Params.Name, confFile)
 		if err != nil {
-			return fmt.Errorf("unable to extract RPC credentials:"+
+			return fmt.Errorf("unable to extract RPC credentials: "+
-				" %v, cannot start w/o RPC connection",
+				"%v, cannot start w/o RPC connection", err)
-				err)
 		}
 		nConf.RPCUser, nConf.RPCPass = rpcUser, rpcPass
 		nConf.ZMQPubRawBlock, nConf.ZMQPubRawTx = zmqBlockHost, zmqTxHost

config_builder.go

@@ -601,7 +601,7 @@ func (d *DefaultWalletImpl) BuildChainControl(
 		*walletConfig, partialChainControl.Cfg.BlockCache,
 	)
 	if err != nil {
-		fmt.Printf("unable to create wallet controller: %v\n", err)
+		err := fmt.Errorf("unable to create wallet controller: %v", err)
 		d.logger.Error(err)
 		return nil, nil, err
 	}
@@ -676,7 +676,7 @@ func (d *RPCSignerWalletImpl) BuildChainControl(
 		*walletConfig, partialChainControl.Cfg.BlockCache,
 	)
 	if err != nil {
-		fmt.Printf("unable to create wallet controller: %v\n", err)
+		err := fmt.Errorf("unable to create wallet controller: %v", err)
 		d.logger.Error(err)
 		return nil, nil, err
 	}
@@ -691,7 +691,8 @@ func (d *RPCSignerWalletImpl) BuildChainControl(
 		rpcwallet.DefaultRPCTimeout,
 	)
 	if err != nil {
-		fmt.Printf("unable to create RPC remote signing wallet %v", err)
+		err := fmt.Errorf("unable to create RPC remote signing wallet "+
+			"%v", err)
 		d.logger.Error(err)
 		return nil, nil, err
 	}

docs/release-notes/release-notes-0.14.0.md

@@ -472,6 +472,9 @@ messages directly. There is no routing/path finding involved.
 * [Fixed two flakes in itests that were caused by things progressing too
   fast](https://github.com/lightningnetwork/lnd/pull/5905).
 
+* [Fixes two issues around configuration parsing and error
+  logging](https://github.com/lightningnetwork/lnd/pull/5948).
+
 ## Database
 
 * [Ensure single writer for legacy

kvdb/kvdb_no_postgres.go

@@ -1,3 +1,4 @@
+//go:build !kvdb_postgres
 // +build !kvdb_postgres
 
 package kvdb

kvdb/kvdb_postgres.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package kvdb

kvdb/postgres/db.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package postgres

kvdb/postgres/db_test.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package postgres

kvdb/postgres/driver.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package postgres

kvdb/postgres/fixture.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package postgres

kvdb/postgres/readwrite_bucket.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package postgres

kvdb/postgres/readwrite_cursor.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package postgres

kvdb/postgres/readwrite_tx.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package postgres

kvdb/postgres_test.go

@@ -1,3 +1,4 @@
+//go:build kvdb_postgres
 // +build kvdb_postgres
 
 package kvdb
@@ -35,13 +36,13 @@ func TestPostgres(t *testing.T) {
 			test: testReadWriteCursor,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(4), "key": "da", "parent_id": int64(1), "sequence": nil, "value": "3"},
+					{"id": int64(4), "key": "da", "parent_id": int64(1), "sequence": nil, "value": "3"},
-					m{"id": int64(6), "key": "a", "parent_id": int64(1), "sequence": nil, "value": "0"},
+					{"id": int64(6), "key": "a", "parent_id": int64(1), "sequence": nil, "value": "0"},
-					m{"id": int64(7), "key": "f", "parent_id": int64(1), "sequence": nil, "value": "5"},
+					{"id": int64(7), "key": "f", "parent_id": int64(1), "sequence": nil, "value": "5"},
-					m{"id": int64(3), "key": "c", "parent_id": int64(1), "sequence": nil, "value": "3"},
+					{"id": int64(3), "key": "c", "parent_id": int64(1), "sequence": nil, "value": "3"},
-					m{"id": int64(9), "key": "cx", "parent_id": int64(1), "sequence": nil, "value": "x"},
+					{"id": int64(9), "key": "cx", "parent_id": int64(1), "sequence": nil, "value": "x"},
-					m{"id": int64(10), "key": "cy", "parent_id": int64(1), "sequence": nil, "value": "y"},
+					{"id": int64(10), "key": "cy", "parent_id": int64(1), "sequence": nil, "value": "y"},
 				},
 			},
 		},
@@ -50,10 +51,10 @@ func TestPostgres(t *testing.T) {
 			test: testReadWriteCursorWithBucketAndValue,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(2), "key": "key", "parent_id": int64(1), "sequence": nil, "value": "val"},
+					{"id": int64(2), "key": "key", "parent_id": int64(1), "sequence": nil, "value": "val"},
-					m{"id": int64(3), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(3), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
-					m{"id": int64(4), "key": "pear", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(4), "key": "pear", "parent_id": int64(1), "sequence": nil, "value": nil},
 				},
 			},
 		},
@@ -62,10 +63,10 @@ func TestPostgres(t *testing.T) {
 			test: testBucketCreation,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
-					m{"id": int64(3), "key": "mango", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(3), "key": "mango", "parent_id": int64(1), "sequence": nil, "value": nil},
-					m{"id": int64(4), "key": "pear", "parent_id": int64(2), "sequence": nil, "value": nil},
+					{"id": int64(4), "key": "pear", "parent_id": int64(2), "sequence": nil, "value": nil},
 				},
 			},
 		},
@@ -74,10 +75,10 @@ func TestPostgres(t *testing.T) {
 			test: testBucketDeletion,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
-					m{"id": int64(3), "key": "key1", "parent_id": int64(2), "sequence": nil, "value": "val1"},
+					{"id": int64(3), "key": "key1", "parent_id": int64(2), "sequence": nil, "value": "val1"},
-					m{"id": int64(5), "key": "key3", "parent_id": int64(2), "sequence": nil, "value": "val3"},
+					{"id": int64(5), "key": "key3", "parent_id": int64(2), "sequence": nil, "value": "val3"},
 				},
 			},
 		},
@@ -86,14 +87,14 @@ func TestPostgres(t *testing.T) {
 			test: testBucketForEach,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
-					m{"id": int64(3), "key": "key1", "parent_id": int64(1), "sequence": nil, "value": "val1"},
+					{"id": int64(3), "key": "key1", "parent_id": int64(1), "sequence": nil, "value": "val1"},
-					m{"id": int64(4), "key": "key1", "parent_id": int64(2), "sequence": nil, "value": "val1"},
+					{"id": int64(4), "key": "key1", "parent_id": int64(2), "sequence": nil, "value": "val1"},
-					m{"id": int64(5), "key": "key2", "parent_id": int64(1), "sequence": nil, "value": "val2"},
+					{"id": int64(5), "key": "key2", "parent_id": int64(1), "sequence": nil, "value": "val2"},
-					m{"id": int64(6), "key": "key2", "parent_id": int64(2), "sequence": nil, "value": "val2"},
+					{"id": int64(6), "key": "key2", "parent_id": int64(2), "sequence": nil, "value": "val2"},
-					m{"id": int64(7), "key": "key3", "parent_id": int64(1), "sequence": nil, "value": "val3"},
+					{"id": int64(7), "key": "key3", "parent_id": int64(1), "sequence": nil, "value": "val3"},
-					m{"id": int64(8), "key": "key3", "parent_id": int64(2), "sequence": nil, "value": "val3"},
+					{"id": int64(8), "key": "key3", "parent_id": int64(2), "sequence": nil, "value": "val3"},
 				},
 			},
 		},
@@ -102,11 +103,11 @@ func TestPostgres(t *testing.T) {
 			test: testBucketForEachWithError,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
-					m{"id": int64(3), "key": "pear", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(3), "key": "pear", "parent_id": int64(1), "sequence": nil, "value": nil},
-					m{"id": int64(4), "key": "key1", "parent_id": int64(1), "sequence": nil, "value": "val1"},
+					{"id": int64(4), "key": "key1", "parent_id": int64(1), "sequence": nil, "value": "val1"},
-					m{"id": int64(5), "key": "key2", "parent_id": int64(1), "sequence": nil, "value": "val2"},
+					{"id": int64(5), "key": "key2", "parent_id": int64(1), "sequence": nil, "value": "val2"},
 				},
 			},
 		},
@@ -115,8 +116,8 @@ func TestPostgres(t *testing.T) {
 			test: testBucketSequence,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(2), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": int64(4), "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": int64(4), "value": nil},
 				},
 			},
 		},
@@ -125,9 +126,9 @@ func TestPostgres(t *testing.T) {
 			test: testKeyClash,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(2), "key": "key", "parent_id": int64(1), "sequence": nil, "value": "val"},
+					{"id": int64(2), "key": "key", "parent_id": int64(1), "sequence": nil, "value": "val"},
-					m{"id": int64(3), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
+					{"id": int64(3), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": nil},
 				},
 			},
 		},
@@ -136,8 +137,8 @@ func TestPostgres(t *testing.T) {
 			test: testBucketCreateDelete,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(3), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": "value"},
+					{"id": int64(3), "key": "banana", "parent_id": int64(1), "sequence": nil, "value": "value"},
 				},
 			},
 		},
@@ -146,8 +147,8 @@ func TestPostgres(t *testing.T) {
 			test: testTxManualCommit,
 			expectedDb: m{
 				"test_kv": []m{
-					m{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
+					{"id": int64(1), "key": "apple", "parent_id": nil, "sequence": nil, "value": nil},
-					m{"id": int64(2), "key": "testKey", "parent_id": int64(1), "sequence": nil, "value": "testVal"},
+					{"id": int64(2), "key": "testKey", "parent_id": int64(1), "sequence": nil, "value": "testVal"},
 				},
 			},
 		},

lnd.go

@@ -70,7 +70,9 @@ const (
 //
 // NOTE: This should only be called after the RPCListener has signaled it is
 // ready.
-func AdminAuthOptions(cfg *Config, skipMacaroons bool) ([]grpc.DialOption, error) {
+func AdminAuthOptions(cfg *Config, skipMacaroons bool) ([]grpc.DialOption,
+	error) {
+
 	creds, err := credentials.NewClientTLSFromFile(cfg.TLSCertPath, "")
 	if err != nil {
 		return nil, fmt.Errorf("unable to read TLS cert: %v", err)
@@ -107,8 +109,8 @@ func AdminAuthOptions(cfg *Config, skipMacaroons bool) ([]grpc.DialOption, error
 	return opts, nil
 }
 
-// ListenerWithSignal is a net.Listener that has an additional Ready channel that
+// ListenerWithSignal is a net.Listener that has an additional Ready channel
-// will be closed when a server starts listening.
+// that will be closed when a server starts listening.
 type ListenerWithSignal struct {
 	net.Listener
 
@@ -148,10 +150,16 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		}
 	}()
 
+	mkErr := func(format string, args ...interface{}) error {
+		ltndLog.Errorf("Shutting down because error in main "+
+			"method: "+format, args...)
+		return fmt.Errorf(format, args...)
+	}
+
 	// Show version at startup.
-	ltndLog.Infof("Version: %s commit=%s, build=%s, logging=%s, debuglevel=%s",
+	ltndLog.Infof("Version: %s commit=%s, build=%s, logging=%s, "+
-		build.Version(), build.Commit, build.Deployment,
+		"debuglevel=%s", build.Version(), build.Commit,
-		build.LoggingType, cfg.DebugLevel)
+		build.Deployment, build.LoggingType, cfg.DebugLevel)
 
 	var network string
 	switch {
@@ -191,10 +199,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 	if cfg.CPUProfile != "" {
 		f, err := os.Create(cfg.CPUProfile)
 		if err != nil {
-			err := fmt.Errorf("unable to create CPU profile: %v",
+			return mkErr("unable to create CPU profile: %v", err)
-				err)
-			ltndLog.Error(err)
-			return err
 		}
 		pprof.StartCPUProfile(f)
 		defer f.Close()
@@ -209,15 +214,13 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 	// needs to be done early and once during the startup process, before
 	// any DB access.
 	if err := cfg.DB.Init(ctx, cfg.graphDatabaseDir()); err != nil {
-		return err
+		return mkErr("error initializing DBs: %v", err)
 	}
 
 	// Only process macaroons if --no-macaroons isn't set.
 	serverOpts, restDialOpts, restListen, cleanUp, err := getTLSConfig(cfg)
 	if err != nil {
-		err := fmt.Errorf("unable to load TLS credentials: %v", err)
+		return mkErr("unable to load TLS credentials: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 
 	defer cleanUp()
@@ -233,9 +236,8 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 			// connections.
 			lis, err := lncfg.ListenOnAddress(grpcEndpoint)
 			if err != nil {
-				ltndLog.Errorf("unable to listen on %s",
+				return mkErr("unable to listen on %s: %v",
-					grpcEndpoint)
+					grpcEndpoint, err)
-				return err
 			}
 			defer lis.Close()
 
@@ -254,7 +256,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		rpcsLog, cfg.NoMacaroons, cfg.RPCMiddleware.Mandatory,
 	)
 	if err := interceptorChain.Start(); err != nil {
-		return err
+		return mkErr("error starting interceptor chain: %v", err)
 	}
 	defer func() {
 		err := interceptorChain.Stop()
@@ -279,14 +281,14 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 	rpcServer := newRPCServer(cfg, interceptorChain, implCfg, interceptor)
 	err = rpcServer.RegisterWithGrpcServer(grpcServer)
 	if err != nil {
-		return err
+		return mkErr("error registering gRPC server: %v", err)
 	}
 
 	// Now that both the WalletUnlocker and LightningService have been
 	// registered with the GRPC server, we can start listening.
 	err = startGrpcListen(cfg, grpcServer, grpcListeners)
 	if err != nil {
-		return err
+		return mkErr("error starting gRPC listener: %v", err)
 	}
 
 	// Now start the REST proxy for our gRPC server above. We'll ensure
@@ -297,7 +299,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		cfg, rpcServer, restDialOpts, restListen,
 	)
 	if err != nil {
-		return err
+		return mkErr("error starting REST proxy: %v", err)
 	}
 	defer stopProxy()
 
@@ -341,8 +343,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 			cfg.Cluster.ID)
 
 		if err := leaderElector.Campaign(electionCtx); err != nil {
-			ltndLog.Errorf("Leadership campaign failed: %v", err)
+			return mkErr("leadership campaign failed: %v", err)
-			return err
 		}
 
 		elected = true
@@ -355,7 +356,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		ltndLog.Infof("%v, exiting", err)
 		return nil
 	case err != nil:
-		return fmt.Errorf("unable to open databases: %v", err)
+		return mkErr("unable to open databases: %v", err)
 	}
 
 	defer cleanUp()
@@ -364,7 +365,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		ctx, dbs, interceptorChain, grpcListeners,
 	)
 	if err != nil {
-		return fmt.Errorf("error creating wallet config: %v", err)
+		return mkErr("error creating wallet config: %v", err)
 	}
 
 	defer cleanUp()
@@ -373,7 +374,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		partialChainControl, walletConfig,
 	)
 	if err != nil {
-		return fmt.Errorf("error loading chain control: %v", err)
+		return mkErr("error loading chain control: %v", err)
 	}
 
 	defer cleanUp()
@@ -392,9 +393,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		},
 	)
 	if err != nil {
-		err := fmt.Errorf("error deriving node key: %v", err)
+		return mkErr("error deriving node key: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 
 	if cfg.Tor.StreamIsolation && cfg.Tor.SkipProxyForClearNetTargets {
@@ -403,33 +402,37 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 
 	if cfg.Tor.Active {
 		if cfg.Tor.SkipProxyForClearNetTargets {
-			srvrLog.Info("Onion services are accessible via Tor! NOTE: " +
+			srvrLog.Info("Onion services are accessible via Tor! " +
-				"Traffic to clearnet services is not routed via Tor.")
+				"NOTE: Traffic to clearnet services is not " +
+				"routed via Tor.")
 		} else {
 			srvrLog.Infof("Proxying all network traffic via Tor "+
-				"(stream_isolation=%v)! NOTE: Ensure the backend node "+
+				"(stream_isolation=%v)! NOTE: Ensure the "+
-				"is proxying over Tor as well", cfg.Tor.StreamIsolation)
+				"backend node is proxying over Tor as well",
+				cfg.Tor.StreamIsolation)
 		}
 	}
 
-	// If tor is active and either v2 or v3 onion services have been specified,
+	// If tor is active and either v2 or v3 onion services have been
-	// make a tor controller and pass it into both the watchtower server and
+	// specified, make a tor controller and pass it into both the watchtower
-	// the regular lnd server.
+	// server and the regular lnd server.
 	var torController *tor.Controller
 	if cfg.Tor.Active && (cfg.Tor.V2 || cfg.Tor.V3) {
 		torController = tor.NewController(
-			cfg.Tor.Control, cfg.Tor.TargetIPAddress, cfg.Tor.Password,
+			cfg.Tor.Control, cfg.Tor.TargetIPAddress,
+			cfg.Tor.Password,
 		)
 
-		// Start the tor controller before giving it to any other subsystems.
+		// Start the tor controller before giving it to any other
+		// subsystems.
 		if err := torController.Start(); err != nil {
-			err := fmt.Errorf("unable to initialize tor controller: %v", err)
+			return mkErr("unable to initialize tor controller: %v",
-			ltndLog.Error(err)
+				err)
-			return err
 		}
 		defer func() {
 			if err := torController.Stop(); err != nil {
-				ltndLog.Errorf("error stopping tor controller: %v", err)
+				ltndLog.Errorf("error stopping tor "+
+					"controller: %v", err)
 			}
 		}()
 	}
@@ -443,9 +446,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 			},
 		)
 		if err != nil {
-			err := fmt.Errorf("error deriving tower key: %v", err)
+			return mkErr("error deriving tower key: %v", err)
-			ltndLog.Error(err)
-			return err
 		}
 
 		wtCfg := &watchtower.Config{
@@ -466,8 +467,8 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 			ChainHash: *cfg.ActiveNetParams.GenesisHash,
 		}
 
-		// If there is a tor controller (user wants auto hidden services), then
+		// If there is a tor controller (user wants auto hidden
-		// store a pointer in the watchtower config.
+		// services), then store a pointer in the watchtower config.
 		if torController != nil {
 			wtCfg.TorController = torController
 			wtCfg.WatchtowerKeyPath = cfg.Tor.WatchtowerKeyPath
@@ -480,19 +481,16 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 			}
 		}
 
-		wtConfig, err := cfg.Watchtower.Apply(wtCfg, lncfg.NormalizeAddresses)
+		wtConfig, err := cfg.Watchtower.Apply(
+			wtCfg, lncfg.NormalizeAddresses,
+		)
 		if err != nil {
-			err := fmt.Errorf("unable to configure watchtower: %v",
+			return mkErr("unable to configure watchtower: %v", err)
-				err)
-			ltndLog.Error(err)
-			return err
 		}
 
 		tower, err = watchtower.New(wtConfig)
 		if err != nil {
-			err := fmt.Errorf("unable to create watchtower: %v", err)
+			return mkErr("unable to create watchtower: %v", err)
-			ltndLog.Error(err)
-			return err
 		}
 	}
 
@@ -507,9 +505,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		chainedAcceptor, torController,
 	)
 	if err != nil {
-		err := fmt.Errorf("unable to create server: %v", err)
+		return mkErr("unable to create server: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 
 	// Set up an autopilot manager from the current config. This will be
@@ -520,21 +516,15 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		cfg.ActiveNetParams,
 	)
 	if err != nil {
-		err := fmt.Errorf("unable to initialize autopilot: %v", err)
+		return mkErr("unable to initialize autopilot: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 
 	atplManager, err := autopilot.NewManager(atplCfg)
 	if err != nil {
-		err := fmt.Errorf("unable to create autopilot manager: %v", err)
+		return mkErr("unable to create autopilot manager: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 	if err := atplManager.Start(); err != nil {
-		err := fmt.Errorf("unable to start autopilot manager: %v", err)
+		return mkErr("unable to start autopilot manager: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 	defer atplManager.Stop()
 
@@ -545,14 +535,10 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 		atplManager, server.invoices, tower, chainedAcceptor,
 	)
 	if err != nil {
-		err := fmt.Errorf("unable to add deps to RPC server: %v", err)
+		return mkErr("unable to add deps to RPC server: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 	if err := rpcServer.Start(); err != nil {
-		err := fmt.Errorf("unable to start RPC server: %v", err)
+		return mkErr("unable to start RPC server: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 	defer rpcServer.Stop()
 
@@ -560,7 +546,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 	interceptorChain.SetRPCActive()
 
 	if err := interceptor.Notifier.NotifyReady(true); err != nil {
-		return err
+		return mkErr("error notifying ready: %v", err)
 	}
 
 	// We'll wait until we're fully synced to continue the start up of the
@@ -569,10 +555,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 	// funds.
 	_, bestHeight, err := activeChainControl.ChainIO.GetBestBlock()
 	if err != nil {
-		err := fmt.Errorf("unable to determine chain tip: %v",
+		return mkErr("unable to determine chain tip: %v", err)
-			err)
-		ltndLog.Error(err)
-		return err
 	}
 
 	ltndLog.Infof("Waiting for chain backend to finish sync, "+
@@ -585,10 +568,8 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 
 		synced, _, err := activeChainControl.Wallet.IsSynced()
 		if err != nil {
-			err := fmt.Errorf("unable to determine if "+
+			return mkErr("unable to determine if wallet is "+
-				"wallet is synced: %v", err)
+				"synced: %v", err)
-			ltndLog.Error(err)
-			return err
 		}
 
 		if synced {
@@ -600,10 +581,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 
 	_, bestHeight, err = activeChainControl.ChainIO.GetBestBlock()
 	if err != nil {
-		err := fmt.Errorf("unable to determine chain tip: %v",
+		return mkErr("unable to determine chain tip: %v", err)
-			err)
-		ltndLog.Error(err)
-		return err
 	}
 
 	ltndLog.Infof("Chain backend is fully synced (end_height=%v)!",
@@ -612,9 +590,7 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 	// With all the relevant chains initialized, we can finally start the
 	// server itself.
 	if err := server.Start(); err != nil {
-		err := fmt.Errorf("unable to start server: %v", err)
+		return mkErr("unable to start server: %v", err)
-		ltndLog.Error(err)
-		return err
 	}
 	defer server.Stop()
 
@@ -626,18 +602,13 @@ func Main(cfg *Config, lisCfg ListenerCfg, implCfg *ImplementationCfg,
 	// stopped together with the autopilot service.
 	if cfg.Autopilot.Active {
 		if err := atplManager.StartAgent(); err != nil {
-			err := fmt.Errorf("unable to start autopilot agent: %v",
+			return mkErr("unable to start autopilot agent: %v", err)
-				err)
-			ltndLog.Error(err)
-			return err
 		}
 	}
 
 	if cfg.Watchtower.Active {
 		if err := tower.Start(); err != nil {
-			err := fmt.Errorf("unable to start watchtower: %v", err)
+			return mkErr("unable to start watchtower: %v", err)
-			ltndLog.Error(err)
-			return err
 		}
 		defer tower.Stop()
 	}

macaroons/service.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/hex"
 	"fmt"
+
 	"github.com/lightningnetwork/lnd/kvdb"
 	"google.golang.org/grpc/metadata"
 	"gopkg.in/macaroon-bakery.v2/bakery"