Resolved merge conflict by incorporating both suggestions.

lib/src/commands.rs

@@ -203,6 +203,46 @@ impl Command for ExportCommand {
     }
 }
 
+struct EncryptCommand {}
+impl Command for EncryptCommand {
+    fn help(&self) -> String {
+        let mut h = vec![];
+        h.push("Encrypt the wallet with a password");
+        h.push("Note 1: This will encrypt the seed and the sapling and transparent private keys.");
+        h.push("        Use 'unlock' to temporarily unlock the wallet for spending or 'decrypt' ");
+        h.push("        to permanatly remove the encryption");
+        h.push("Note 2: If you forget the password, the only way to recover the wallet is to restore");
+        h.push("        from the seed phrase.");
+        h.push("Usage:");
+        h.push("encrypt password");
+        h.push("");
+        h.push("Example:");
+        h.push("encrypt my_strong_password");
+
+        h.join("\n")
+    }
+
+    fn short_help(&self) -> String {
+        "Encrypt the wallet with a password".to_string()
+    }
+
+    fn exec(&self, args: &[&str], lightclient: &LightClient) -> String {
+        if args.len() != 1 {
+            return self.help();
+        }
+
+        let passwd = args[0].to_string();
+
+        match lightclient.wallet.write().unwrap().encrypt(passwd) {
+            Ok(_)  => object!{ "result" => "success" },
+            Err(e) => object!{
+                "result" => "error",
+                "error"  => e.to_string()
+            }
+        }.pretty(2)
+    }
+}
+
 struct DecryptCommand {}
 impl Command for DecryptCommand {
     fn help(&self) -> String {
@@ -359,7 +399,6 @@ impl Command for SendCommand {
             };
 
             let memo = if args.len() == 3 { Some(args[2].to_string()) } else {None};
-            
             lightclient.do_sync(true);
             match lightclient.do_send(vec!((args[0], value, memo))) {
                 Ok(txid) => { object!{ "txid" => txid } },