lotus-wallet: Describe setup with auth

cmd/lotus-wallet/main.go

@@ -52,6 +52,17 @@ func main() {
 		Name:    "lotus-wallet",
 		Usage:   "Basic external wallet",
 		Version: build.UserVersion(),
+		Description: `
+lotus-wallet provides a remote wallet service for lotus.
+
+To configure your lotus node to use a remote wallet:
+* Run 'lotus-wallet get-api-key' to generate API key
+* Start lotus-wallet using 'lotus-wallet run' (see --help for additional flags)
+* Edit lotus config (~/.lotus/config.toml)
+  * Find the '[Wallet]' section
+  * Set 'RemoteBackend' to '[api key]:http://[wallet ip]:[wallet port]'
+    (the default port is 1777)
+* Start (or restart) the lotus daemon`,
 		Flags: []cli.Flag{
 			&cli.StringFlag{
 				Name:    FlagWalletRepo,
@@ -78,7 +89,7 @@ func main() {
 
 var getApiKeyCmd = &cli.Command{
 	Name:  "get-api-key",
-	Usage: "Print API Key",
+	Usage: "Generate API Key",
 	Action: func(cctx *cli.Context) error {
 		lr, ks, err := openRepo(cctx)
 		if err != nil {
@@ -132,6 +143,7 @@ var runCmd = &cli.Command{
 			Hidden: true,
 		},
 	},
+	Description: "For setup instructions see 'lotus-wallet --help'",
 	Action: func(cctx *cli.Context) error {
 		log.Info("Starting lotus wallet")