Cleanup

rust-lightclient/src/commands.rs

@@ -39,6 +39,7 @@ impl Command for HelpCommand {
 
     fn exec(&self, _args: &[String], _: &mut LightClient) {
         // Print a list of all commands
+        println!("Available commands:");
         get_commands().iter().for_each(| (cmd, obj) | {
             println!("{} - {}", cmd, obj.short_help());
         });

rust-lightclient/src/lightclient.rs

@@ -1,5 +1,6 @@
 use crate::lightwallet::LightWallet;
 
+use std::path::Path;
 use std::fs::File;
 use std::io;
 use std::io::prelude::*;
@@ -63,9 +64,20 @@ impl LightClient {
     }
 
     pub fn do_read(&mut self) {
+        if !Path::new("wallet.dat").exists() {
+            println!("No existing wallet");
+            return;
+        }
+
         print!("Reading wallet...");
         io::stdout().flush().ok().expect("Could not flush stdout");
-        let mut file_buffer = File::open("wallet.dat").unwrap();
+        let mut file_buffer = match File::open("wallet.dat") {
+            Ok(f)  => f,
+            Err(e) => {
+                println!("[Error: {}]", e.description());
+                return;
+            }
+        };
         
         let lw = LightWallet::read(&mut file_buffer).unwrap();
         self.wallet = Arc::new(lw);

rust-lightclient/src/main.rs

@@ -16,6 +16,7 @@ pub mod grpc_client {
 
 
 pub fn main() {
+    println!("Starting Light Client");
     let mut lightclient = LightClient::new();
 
     // At startup, read the wallet.dat 
@@ -23,11 +24,12 @@ pub fn main() {
 
     // `()` can be used when no completer is required
     let mut rl = Editor::<()>::new();
-    if rl.load_history("history.txt").is_err() {
-        println!("No previous history.");
-    }
+    let _ = rl.load_history("history.txt");
+
+    println!("Ready!");
+
     loop {
-        let readline = rl.readline(&format!("Block:{} (h for help) >> ", lightclient.last_scanned_height()));
+        let readline = rl.readline(&format!("Block:{} (type 'help') >> ", lightclient.last_scanned_height()));
         match readline {
             Ok(line) => {
                 rl.add_history_entry(line.as_str());