wrote server stub

server/src/lib.rs

@@ -0,0 +1,2 @@
+pub mod server;
+pub mod types;

server/src/main.rs

@@ -1,3 +1,45 @@
-fn main() {
-    println!("Hello, world!");
+use std::future::Future;
+use std::net::{IpAddr, Ipv6Addr};
+use futures::future::{self};
+use futures::StreamExt;
+use tarpc::{
+    server::{Channel},
+    tokio_serde::formats::Json,
+};
+use tarpc::server::incoming::Incoming;
+use tarpc::server::BaseChannel;
+use realm_server::server::RealmChatServer;
+use realm_server::types::RealmChat;
+
+async fn spawn(fut: impl Future<Output = ()> + Send + 'static) {
+    tokio::spawn(fut);
 }
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    let server_addr = (IpAddr::V6(Ipv6Addr::LOCALHOST), 5051);
+
+    // JSON transport is provided by the json_transport tarpc module. It makes it easy
+    // to start up a serde-powered json serialization strategy over TCP.
+    let mut listener = tarpc::serde_transport::tcp::listen(&server_addr, Json::default).await?;
+    tracing::info!("Listening on port {}", listener.local_addr().port());
+    listener.config_mut().max_frame_length(usize::MAX);
+    listener
+        // Ignore accept errors.
+        .filter_map(|r| future::ready(r.ok()))
+        .map(BaseChannel::with_defaults)
+        // Limit channels to 1 per IP.
+        .max_channels_per_key(1, |t| t.transport().peer_addr().unwrap().ip())
+        // serve is generated by the service attribute. It takes as input any type implementing
+        // the generated World trait.
+        .map(|channel| {
+            let server = RealmChatServer(channel.transport().peer_addr().unwrap());
+            channel.execute(server.serve()).for_each(spawn)
+        })
+        // Max 10 channels.
+        .buffer_unordered(10)
+        .for_each(|_| async {})
+        .await;
+
+    Ok(())
+}

server/src/server.rs

@@ -0,0 +1,14 @@
+use std::net::SocketAddr;
+use futures::future;
+use futures::future::Ready;
+use tarpc::context::Context;
+use crate::types::RealmChat;
+
+#[derive(Clone)]
+pub struct RealmChatServer(pub SocketAddr);
+
+impl RealmChat for RealmChatServer {
+	fn test(self, context: Context,  name: String) -> Ready<String> {
+		future::ready(format!("Hello, {name}!"))
+	}
+}

server/src/types.rs

@@ -0,0 +1,4 @@
+#[tarpc::service]
+pub trait RealmChat {
+	async fn test(name: String) -> String;
+}