main: add grpc server config option

config_spec.toml

@@ -31,3 +31,9 @@ name = "log_level"
 type = "String"
 optional = true
 doc = "The log verbosity level. This can be set to either 'error', 'warn', 'info', 'debug' or 'trace'."
+
+[[param]]
+name = "grpc_port"
+type = "u16"
+optional = true
+doc = "The port the grpc server will run on. Defaults to 7000."

src/cli.rs

@@ -44,6 +44,9 @@ struct Cli {
     #[arg(short, long, global = true, required = false, default_value = get_macaroon_path_default())]
     macaroon: String,
 
+    #[arg(short, long, global = true, required = false, default_value = DEFAULT_SERVER_PORT.to_string())]
+    grpc_port: u16,
+
     #[arg(
         short,
         long,
@@ -101,7 +104,8 @@ async fn main() -> Result<(), ()> {
             ref offer_string,
             amount,
         } => {
-            let mut client = OffersClient::connect(format!("http://[::1]:{DEFAULT_SERVER_PORT}"))
+            let grpc_port = args.grpc_port;
+            let mut client = OffersClient::connect(format!("http://[::1]:{grpc_port}"))
                 .await
                 .map_err(|e| {
                     println!("ERROR: connecting to server {:?}.", e);

src/main.rs

@@ -52,16 +52,20 @@ async fn main() -> Result<(), ()> {
         .expect("failed to get info")
         .into_inner();
 
-    let addr = format!("[::1]:{DEFAULT_SERVER_PORT}")
-        .parse()
-        .map_err(|e| {
-            error!("Error parsing API address: {e}");
-        })?;
+    let grpc_port = match config.grpc_port {
+        Some(port) => port,
+        None => DEFAULT_SERVER_PORT,
+    };
+    let addr = format!("[::1]:{grpc_port}").parse().map_err(|e| {
+        error!("Error parsing API address: {e}");
+    })?;
     let server = LNDKServer::new(Arc::clone(&handler), &info.identity_pubkey).await;
     let server_fut = Server::builder()
         .add_service(OffersServer::new(server))
         .serve(addr);
 
+    info!("Starting lndk's grpc server on port {grpc_port}");
+
     select! {
        _ = messenger.run(args, Arc::clone(&handler)) => {
            info!("Onion messenger completed");