[feat][code] proto crate, one stream per request

crates/lanspread-utils/src/lib.rs

@@ -0,0 +1 @@
+pub mod macros;

crates/lanspread-utils/src/macros.rs

@@ -0,0 +1,6 @@
+#[macro_export]
+macro_rules! maybe_addr {
+    ($addr:expr) => {
+        $addr.map_or("<unknown>".to_string(), |addr| addr.to_string())
+    };
+}