litd: allow faster startup by making re-try configurable

This change will speed up integration tests by not waiting a full 5
seconds before re-trying the connection to lnd if it fails the first
time.

Author: guggero

config.go

@@ -190,8 +190,9 @@ type Config struct {
 	// friendly. Because then we can reference the explicit modes in the
 	// help descriptions of the section headers. We'll parse the mode into
 	// a bool for internal use for better code readability.
-	LndMode string      `long:"lnd-mode" description:"The mode to run lnd in, either 'remote' (default) or 'integrated'. 'integrated' means lnd is started alongside the UI and everything is stored in lnd's main data directory, configure everything by using the --lnd.* flags. 'remote' means the UI connects to an existing lnd node and acts as a proxy for gRPC calls to it. In the remote node LiT creates its own directory for log and configuration files, configure everything using the --remote.* flags." choice:"integrated" choice:"remote"`
-	Lnd     *lnd.Config `group:"Integrated lnd (use when lnd-mode=integrated)" namespace:"lnd"`
+	LndMode            string        `long:"lnd-mode" description:"The mode to run lnd in, either 'remote' (default) or 'integrated'. 'integrated' means lnd is started alongside the UI and everything is stored in lnd's main data directory, configure everything by using the --lnd.* flags. 'remote' means the UI connects to an existing lnd node and acts as a proxy for gRPC calls to it. In the remote node LiT creates its own directory for log and configuration files, configure everything using the --remote.* flags." choice:"integrated" choice:"remote"`
+	Lnd                *lnd.Config   `group:"Integrated lnd (use when lnd-mode=integrated)" namespace:"lnd"`
+	LndConnectInterval time.Duration `long:"lndconnectinterval" hidden:"true" description:"The interval at which LiT tries to connect to the lnd node. This value should only be changed for development mode."`
 
 	FaradayMode string          `long:"faraday-mode" description:"The mode to run faraday in, either 'integrated' (default), 'remote' or 'disable'. 'integrated' means faraday is started alongside the UI and everything is stored in faraday's main data directory, configure everything by using the --faraday.* flags. 'remote' means the UI connects to an existing faraday node and acts as a proxy for gRPC calls to it. 'disable' means that LiT is started without faraday." choice:"integrated" choice:"remote" choice:"disable"`
 	Faraday     *faraday.Config `group:"Integrated faraday options (use when faraday-mode=integrated)" namespace:"faraday"`
@@ -312,6 +313,7 @@ func defaultConfig() *Config {
 		Network:              DefaultNetwork,
 		LndMode:              DefaultLndMode,
 		Lnd:                  &lndDefaultConfig,
+		LndConnectInterval:   defaultStartupTimeout,
 		LitDir:               DefaultLitDir,
 		LetsEncryptListen:    defaultLetsEncryptListen,
 		LetsEncryptDir:       defaultLetsEncryptDir,

terminal.go

@@ -809,7 +809,7 @@ func (g *LightningTerminal) setUpLNDClients(lndQuit chan struct{}) error {
 		case <-interceptor.ShutdownChannel():
 			return fmt.Errorf("received the shutdown signal")
 
-		case <-time.After(defaultStartupTimeout):
+		case <-time.After(g.cfg.LndConnectInterval):
 			return nil
 		}
 	}
@@ -891,16 +891,19 @@ func (g *LightningTerminal) setUpLNDClients(lndQuit chan struct{}) error {
 	for {
 		g.lndClient, err = lndclient.NewLndServices(
 			&lndclient.LndServicesConfig{
-				LndAddress:            host,
-				Network:               network,
-				TLSPath:               tlsPath,
-				Insecure:              insecure,
-				CustomMacaroonPath:    macPath,
-				CustomMacaroonHex:     hex.EncodeToString(macData),
+				LndAddress:         host,
+				Network:            network,
+				TLSPath:            tlsPath,
+				Insecure:           insecure,
+				CustomMacaroonPath: macPath,
+				CustomMacaroonHex: hex.EncodeToString(
+					macData,
+				),
 				BlockUntilChainSynced: true,
 				BlockUntilUnlocked:    true,
 				CallerCtx:             ctxc,
 				CheckVersion:          minimalCompatibleVersion,
+				ChainSyncPollInterval: g.cfg.LndConnectInterval,
 			},
 		)
 		if err == nil {