Print simple HelloCmd packet

cove-core/Cargo.toml

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+serde = { version = "1.0.136", features = ["derive"] }

cove-core/src/lib.rs

@@ -1,8 +1,25 @@
-#[cfg(test)]
-mod tests {
-    #[test]
-    fn it_works() {
-        let result = 2 + 2;
-        assert_eq!(result, 4);
-    }
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct HelloCmd {
+    pub name: String,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct HelloRpl {
+    pub msg: String,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+#[serde(tag = "type")]
+pub enum Data {
+    HelloCmd(HelloCmd),
+    HelloRpl(HelloRpl),
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct Packet {
+    pub id: u64,
+    #[serde(flatten)]
+    pub data: Data,
 }