work (new network + db initial working state)

src/bin/server/net.rs

@@ -1,5 +1,5 @@
 use openworm::net::{
-    ClientMsg, ClientMsgInst, RecvHandler, SERVER_NAME, SendResult, ServerMsg, ServerMsgInst,
+    ClientRequestMsg, RecvHandler, RequestId, SERVER_NAME, SendResult, ServerMsg, ServerRespMsg,
     recv_uni, send_uni,
 };
 use quinn::{
@@ -63,8 +63,34 @@ impl ClientSender {
     pub fn remote(&self) -> SocketAddr {
         self.conn.remote_address()
     }
+
+    pub fn replier(&self, id: RequestId) -> ClientReplier {
+        ClientReplier {
+            conn: self.conn.clone(),
+            req_id: id,
+        }
+    }
+
     pub async fn send(&self, msg: impl Into<ServerMsg>) -> SendResult {
-        let msg = ServerMsgInst::from(msg.into());
+        let msg = ServerRespMsg {
+            id: None,
+            msg: msg.into().into(),
+        };
+        send_uni(&self.conn, msg).await
+    }
+}
+
+pub struct ClientReplier {
+    conn: Connection,
+    req_id: RequestId,
+}
+
+impl ClientReplier {
+    pub async fn send(&self, msg: impl Into<ServerMsg>) -> SendResult {
+        let msg = ServerRespMsg {
+            id: Some(self.req_id),
+            msg: msg.into().into(),
+        };
         send_uni(&self.conn, msg).await
     }
 }
@@ -73,7 +99,7 @@ pub trait ConAccepter: Send + Sync + 'static {
     fn accept(
         &self,
         send: ClientSender,
-    ) -> impl Future<Output = impl RecvHandler<ClientMsgInst>> + Send;
+    ) -> impl Future<Output = impl RecvHandler<ClientRequestMsg>> + Send;
 }
 
 pub fn listen(