Note multicasting

This is an initial implementation of note multicast, which sends posted
notes to other notedecks on the same network.

This came about after I nerd sniped myself thinking about p2p nostr on
local networks[1]

You can test this exclusively without joining any other relays by
passing -r multicast on the command line.

[1] https://damus.io/note1j50pseqwma38g3aqrsnhvld0m0ysdgppw6fjnvvcj0haeulgswgq80lpca

Signed-off-by: William Casarin <jb55@jb55.com>

Cargo.lock

@@ -1211,12 +1211,14 @@ dependencies = [
  "bech32",
  "ewebsock",
  "hex",
+ "mio",
  "nostr",
  "nostrdb",
  "serde",
  "serde_derive",
  "serde_json",
  "thiserror 2.0.7",
+ "tokio",
  "tracing",
  "url",
 ]
@@ -2351,6 +2353,18 @@ dependencies = [
  "simd-adler32",
 ]
 
+[[package]]
+name = "mio"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2886843bf800fba2e3377cff24abf6379b4c4d5c6681eaf9ea5b0d15090450bd"
+dependencies = [
+ "libc",
+ "log",
+ "wasi",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "naga"
 version = "22.1.0"
@@ -2508,9 +2522,8 @@ dependencies = [
 
 [[package]]
 name = "nostrdb"
-version = "0.5.2"
+version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
+source = "git+https://github.com/damus-io/nostrdb-rs?rev=2111948b078b24a1659d0bd5d8570f370269c99b#2111948b078b24a1659d0bd5d8570f370269c99b"
-checksum = "775484658a10d646c5e835fb9132a7528d1bf546a791d1176b052f1be69c04b2"
 dependencies = [
  "bindgen",
  "cc",

Cargo.toml

@@ -28,8 +28,9 @@ image = { version = "0.25", features = ["jpeg", "png", "webp"] }
 indexmap = "2.6.0"
 log = "0.4.17"
 nostr = { version = "0.37.0", default-features = false, features = ["std", "nip49"] }
-#nostrdb = { git = "https://github.com/damus-io/nostrdb-rs", rev = "b1bc794e9e5f2fb27dad0f95b6974ed2b81872d0" }
+mio = { version = "1.0.3", features = ["os-poll", "net"] }
-nostrdb = "0.5.2"
+nostrdb = { git = "https://github.com/damus-io/nostrdb-rs", rev = "2111948b078b24a1659d0bd5d8570f370269c99b" }
+#nostrdb = "0.5.2"
 notedeck = { path = "crates/notedeck" }
 notedeck_chrome = { path = "crates/notedeck_chrome" }
 notedeck_columns = { path = "crates/notedeck_columns" }

crates/enostr/Cargo.toml

@@ -17,3 +17,5 @@ hex = { workspace = true }
 tracing = { workspace = true }
 thiserror = { workspace = true }
 url = { workspace = true }
+mio = { workspace = true }
+tokio = { workspace = true }

crates/enostr/src/client/message.rs

@@ -1,13 +1,22 @@
-use crate::{Error, Note};
+use crate::Error;
-use nostrdb::Filter;
+use nostrdb::{Filter, Note};
 use serde_json::json;
 
+#[derive(Debug)]
+pub struct EventClientMessage<'a> {
+    note: Note<'a>,
+}
+
+impl EventClientMessage<'_> {
+    pub fn to_json(&self) -> Result<String, Error> {
+        Ok(format!("[\"EVENT\", {}]", self.note.json()?))
+    }
+}
+
 /// Messages sent by clients, received by relays
 #[derive(Debug)]
-pub enum ClientMessage {
+pub enum ClientMessage<'a> {
-    Event {
+    Event(EventClientMessage<'a>),
-        note: Note,
-    },
     Req {
         sub_id: String,
         filters: Vec<Filter>,
@@ -18,9 +27,9 @@ pub enum ClientMessage {
     Raw(String),
 }
 
-impl ClientMessage {
+impl<'a> ClientMessage<'a> {
-    pub fn event(note: Note) -> Self {
+    pub fn event(note: Note<'a>) -> Self {
-        ClientMessage::Event { note }
+        ClientMessage::Event(EventClientMessage { note })
     }
 
     pub fn raw(raw: String) -> Self {
@@ -37,7 +46,7 @@ impl ClientMessage {
 
     pub fn to_json(&self) -> Result<String, Error> {
         Ok(match self {
-            Self::Event { note } => json!(["EVENT", note]).to_string(),
+            Self::Event(ecm) => ecm.to_json()?,
             Self::Raw(raw) => raw.clone(),
             Self::Req { sub_id, filters } => {
                 if filters.is_empty() {

crates/enostr/src/client/mod.rs

@@ -1,3 +1,3 @@
 mod message;
 
-pub use message::ClientMessage;
+pub use message::{ClientMessage, EventClientMessage};

crates/enostr/src/error.rs

@@ -29,6 +29,9 @@ pub enum Error {
     #[error("json error: {0}")]
     Json(#[from] serde_json::Error),
 
+    #[error("io error: {0}")]
+    Io(#[from] std::io::Error),
+
     #[error("nostrdb error: {0}")]
     Nostrdb(#[from] nostrdb::Error),
 

crates/enostr/src/lib.rs

@@ -7,7 +7,7 @@ mod profile;
 mod pubkey;
 mod relay;
 
-pub use client::ClientMessage;
+pub use client::{ClientMessage, EventClientMessage};
 pub use error::Error;
 pub use ewebsock;
 pub use filter::Filter;
@@ -17,7 +17,7 @@ pub use note::{Note, NoteId};
 pub use profile::Profile;
 pub use pubkey::Pubkey;
 pub use relay::message::{RelayEvent, RelayMessage};
-pub use relay::pool::{PoolEvent, RelayPool};
+pub use relay::pool::{PoolEvent, PoolRelay, RelayPool};
 pub use relay::{Relay, RelayStatus};
 
 pub type Result<T> = std::result::Result<T, error::Error>;

crates/enostr/src/relay/mod.rs

@@ -1,21 +1,152 @@
-use ewebsock::{Options, WsMessage, WsReceiver, WsSender};
+use ewebsock::{Options, WsEvent, WsMessage, WsReceiver, WsSender};
+use mio::net::UdpSocket;
+use std::io;
+use std::net::IpAddr;
+use std::net::{SocketAddr, SocketAddrV4};
+use std::time::{Duration, Instant};
 
-use crate::{ClientMessage, Result};
+use crate::{ClientMessage, EventClientMessage, Result};
-use nostrdb::Filter;
 use std::fmt;
 use std::hash::{Hash, Hasher};
-use tracing::{debug, error, info};
+use std::net::Ipv4Addr;
+use tracing::{debug, error};
 
 pub mod message;
 pub mod pool;
 
-#[derive(Debug)]
+#[derive(Debug, Copy, Clone)]
 pub enum RelayStatus {
     Connected,
     Connecting,
     Disconnected,
 }
 
+pub struct MulticastRelay {
+    last_join: Instant,
+    status: RelayStatus,
+    address: SocketAddrV4,
+    socket: UdpSocket,
+    interface: Ipv4Addr,
+}
+
+impl MulticastRelay {
+    pub fn new(address: SocketAddrV4, socket: UdpSocket, interface: Ipv4Addr) -> Self {
+        let last_join = Instant::now();
+        let status = RelayStatus::Connected;
+        MulticastRelay {
+            status,
+            address,
+            socket,
+            interface,
+            last_join,
+        }
+    }
+
+    /// Multicast seems to fail every 260 seconds. We force a rejoin every 200 seconds or
+    /// so to ensure we are always in the group
+    pub fn rejoin(&mut self) -> Result<()> {
+        self.last_join = Instant::now();
+        self.status = RelayStatus::Disconnected;
+        self.socket
+            .leave_multicast_v4(self.address.ip(), &self.interface)?;
+        self.socket
+            .join_multicast_v4(self.address.ip(), &self.interface)?;
+        self.status = RelayStatus::Connected;
+        Ok(())
+    }
+
+    pub fn should_rejoin(&self) -> bool {
+        (Instant::now() - self.last_join) >= Duration::from_secs(200)
+    }
+
+    pub fn try_recv(&self) -> Option<WsEvent> {
+        let mut buffer = [0u8; 65535];
+        // Read the size header
+        match self.socket.recv_from(&mut buffer) {
+            Ok((size, src)) => {
+                let parsed_size = u32::from_be_bytes(buffer[0..4].try_into().ok()?) as usize;
+                debug!("multicast: read size {} from start of header", size - 4);
+
+                if size != parsed_size + 4 {
+                    error!(
+                        "multicast: partial data received: expected {}, got {}",
+                        parsed_size, size
+                    );
+                    return None;
+                }
+
+                let text = String::from_utf8_lossy(&buffer[4..size]);
+                debug!("multicast: received {} bytes from {}: {}", size, src, &text);
+                Some(WsEvent::Message(WsMessage::Text(text.to_string())))
+            }
+            Err(e) if e.kind() == io::ErrorKind::WouldBlock => {
+                // No data available, continue
+                None
+            }
+            Err(e) => {
+                error!("multicast: error receiving data: {}", e);
+                None
+            }
+        }
+    }
+
+    pub fn send(&self, msg: &EventClientMessage) -> Result<()> {
+        let json = msg.to_json()?;
+        let len = json.len();
+
+        debug!("writing to multicast relay");
+        let mut buf: Vec<u8> = Vec::with_capacity(4 + len);
+
+        // Write the length of the message as 4 bytes (big-endian)
+        buf.extend_from_slice(&(len as u32).to_be_bytes());
+
+        // Append the JSON message bytes
+        buf.extend_from_slice(json.as_bytes());
+
+        self.socket.send_to(&buf, SocketAddr::V4(self.address))?;
+        Ok(())
+    }
+}
+
+pub fn setup_multicast_relay(
+    wakeup: impl Fn() + Send + Sync + Clone + 'static,
+) -> Result<MulticastRelay> {
+    use mio::{Events, Interest, Poll, Token};
+
+    let port = 9797;
+    let address = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), port);
+    let multicast_ip = Ipv4Addr::new(239, 19, 88, 1);
+
+    let mut socket = UdpSocket::bind(address)?;
+    let interface = Ipv4Addr::UNSPECIFIED;
+    let multicast_address = SocketAddrV4::new(multicast_ip, port);
+
+    socket.join_multicast_v4(&multicast_ip, &interface)?;
+
+    let mut poll = Poll::new()?;
+    poll.registry().register(
+        &mut socket,
+        Token(0),
+        Interest::READABLE | Interest::WRITABLE,
+    )?;
+
+    // wakeup our render thread when we have new stuff on the socket
+    std::thread::spawn(move || {
+        let mut events = Events::with_capacity(1);
+        loop {
+            if let Err(err) = poll.poll(&mut events, Some(Duration::from_millis(100))) {
+                error!("multicast socket poll error: {err}. ending multicast poller.");
+                return;
+            }
+            wakeup();
+
+            std::thread::yield_now();
+        }
+    });
+
+    Ok(MulticastRelay::new(multicast_address, socket, interface))
+}
+
 pub struct Relay {
     pub url: String,
     pub status: RelayStatus,
@@ -89,12 +220,4 @@ impl Relay {
         let msg = WsMessage::Ping(vec![]);
         self.sender.send(msg);
     }
-
-    pub fn subscribe(&mut self, subid: String, filters: Vec<Filter>) {
-        info!(
-            "sending '{}' subscription to relay pool: {:?}",
-            subid, filters
-        );
-        self.send(&ClientMessage::req(subid, filters));
-    }
 }

crates/enostr/src/relay/pool.rs

@@ -1,4 +1,4 @@
-use crate::relay::{Relay, RelayStatus};
+use crate::relay::{setup_multicast_relay, MulticastRelay, Relay, RelayStatus};
 use crate::{ClientMessage, Result};
 use nostrdb::Filter;
 
@@ -33,7 +33,12 @@ pub struct PoolEventBuf {
     pub event: ewebsock::WsEvent,
 }
 
-pub struct PoolRelay {
+pub enum PoolRelay {
+    Websocket(WebsocketRelay),
+    Multicast(MulticastRelay),
+}
+
+pub struct WebsocketRelay {
     pub relay: Relay,
     pub last_ping: Instant,
     pub last_connect_attempt: Instant,
@@ -41,8 +46,69 @@ pub struct PoolRelay {
 }
 
 impl PoolRelay {
-    pub fn new(relay: Relay) -> PoolRelay {
+    pub fn url(&self) -> &str {
-        PoolRelay {
+        match self {
+            Self::Websocket(wsr) => &wsr.relay.url,
+            Self::Multicast(_wsr) => "multicast",
+        }
+    }
+
+    pub fn set_status(&mut self, status: RelayStatus) {
+        match self {
+            Self::Websocket(wsr) => {
+                wsr.relay.status = status;
+            }
+            Self::Multicast(_mcr) => {}
+        }
+    }
+
+    pub fn try_recv(&self) -> Option<WsEvent> {
+        match self {
+            Self::Websocket(recvr) => recvr.relay.receiver.try_recv(),
+            Self::Multicast(recvr) => recvr.try_recv(),
+        }
+    }
+
+    pub fn status(&self) -> RelayStatus {
+        match self {
+            Self::Websocket(wsr) => wsr.relay.status,
+            Self::Multicast(mcr) => mcr.status,
+        }
+    }
+
+    pub fn send(&mut self, msg: &ClientMessage) -> Result<()> {
+        match self {
+            Self::Websocket(wsr) => {
+                wsr.relay.send(msg);
+                Ok(())
+            }
+
+            Self::Multicast(mcr) => {
+                // we only send event client messages at the moment
+                if let ClientMessage::Event(ecm) = msg {
+                    mcr.send(ecm)?;
+                }
+                Ok(())
+            }
+        }
+    }
+
+    pub fn subscribe(&mut self, subid: String, filter: Vec<Filter>) -> Result<()> {
+        self.send(&ClientMessage::req(subid, filter))
+    }
+
+    pub fn websocket(relay: Relay) -> Self {
+        Self::Websocket(WebsocketRelay::new(relay))
+    }
+
+    pub fn multicast(wakeup: impl Fn() + Send + Sync + Clone + 'static) -> Result<Self> {
+        Ok(Self::Multicast(setup_multicast_relay(wakeup)?))
+    }
+}
+
+impl WebsocketRelay {
+    pub fn new(relay: Relay) -> Self {
+        Self {
             relay,
             last_ping: Instant::now(),
             last_connect_attempt: Instant::now(),
@@ -75,6 +141,15 @@ impl RelayPool {
         }
     }
 
+    pub fn add_multicast_relay(
+        &mut self,
+        wakeup: impl Fn() + Send + Sync + Clone + 'static,
+    ) -> Result<()> {
+        let multicast_relay = PoolRelay::multicast(wakeup)?;
+        self.relays.push(multicast_relay);
+        Ok(())
+    }
+
     pub fn ping_rate(&mut self, duration: Duration) -> &mut Self {
         self.ping_rate = duration;
         self
@@ -82,7 +157,7 @@ impl RelayPool {
 
     pub fn has(&self, url: &str) -> bool {
         for relay in &self.relays {
-            if relay.relay.url == url {
+            if relay.url() == url {
                 return true;
             }
         }
@@ -93,25 +168,35 @@ impl RelayPool {
     pub fn urls(&self) -> BTreeSet<String> {
         self.relays
             .iter()
-            .map(|pool_relay| pool_relay.relay.url.clone())
+            .map(|pool_relay| pool_relay.url().to_string())
             .collect()
     }
 
     pub fn send(&mut self, cmd: &ClientMessage) {
         for relay in &mut self.relays {
-            relay.relay.send(cmd);
+            if let Err(err) = relay.send(cmd) {
+                error!("error sending {:?} to {}: {err}", cmd, relay.url());
+            }
         }
     }
 
     pub fn unsubscribe(&mut self, subid: String) {
         for relay in &mut self.relays {
-            relay.relay.send(&ClientMessage::close(subid.clone()));
+            if let Err(err) = relay.send(&ClientMessage::close(subid.clone())) {
+                error!(
+                    "error unsubscribing from {} on {}: {err}",
+                    &subid,
+                    relay.url()
+                );
+            }
         }
     }
 
     pub fn subscribe(&mut self, subid: String, filter: Vec<Filter>) {
         for relay in &mut self.relays {
-            relay.relay.subscribe(subid.clone(), filter.clone());
+            if let Err(err) = relay.send(&ClientMessage::req(subid.clone(), filter.clone())) {
+                error!("error subscribing to {}: {err}", relay.url());
+            }
         }
     }
 
@@ -121,50 +206,58 @@ impl RelayPool {
         for relay in &mut self.relays {
             let now = std::time::Instant::now();
 
-            match relay.relay.status {
+            match relay {
-                RelayStatus::Disconnected => {
+                PoolRelay::Multicast(_) => {}
-                    let reconnect_at = relay.last_connect_attempt + relay.retry_connect_after;
+                PoolRelay::Websocket(relay) => {
-                    if now > reconnect_at {
+                    match relay.relay.status {
-                        relay.last_connect_attempt = now;
+                        RelayStatus::Disconnected => {
-                        let next_duration = Duration::from_millis(
+                            let reconnect_at =
-                            ((relay.retry_connect_after.as_millis() as f64) * 1.5) as u64,
+                                relay.last_connect_attempt + relay.retry_connect_after;
-                        );
+                            if now > reconnect_at {
-                        debug!(
+                                relay.last_connect_attempt = now;
-                            "bumping reconnect duration from {:?} to {:?} and retrying connect",
+                                let next_duration = Duration::from_millis(
-                            relay.retry_connect_after, next_duration
+                                    ((relay.retry_connect_after.as_millis() as f64) * 1.5) as u64,
-                        );
+                                );
-                        relay.retry_connect_after = next_duration;
+                                debug!(
-                        if let Err(err) = relay.relay.connect(wakeup.clone()) {
+                                    "bumping reconnect duration from {:?} to {:?} and retrying connect",
-                            error!("error connecting to relay: {}", err);
+                                    relay.retry_connect_after, next_duration
+                                );
+                                relay.retry_connect_after = next_duration;
+                                if let Err(err) = relay.relay.connect(wakeup.clone()) {
+                                    error!("error connecting to relay: {}", err);
+                                }
+                            } else {
+                                // let's wait a bit before we try again
+                            }
+                        }
+
+                        RelayStatus::Connected => {
+                            relay.retry_connect_after =
+                                WebsocketRelay::initial_reconnect_duration();
+
+                            let should_ping = now - relay.last_ping > self.ping_rate;
+                            if should_ping {
+                                debug!("pinging {}", relay.relay.url);
+                                relay.relay.ping();
+                                relay.last_ping = Instant::now();
+                            }
+                        }
+
+                        RelayStatus::Connecting => {
+                            // cool story bro
                         }
-                    } else {
-                        // let's wait a bit before we try again
                     }
                 }
-
-                RelayStatus::Connected => {
-                    relay.retry_connect_after = PoolRelay::initial_reconnect_duration();
-
-                    let should_ping = now - relay.last_ping > self.ping_rate;
-                    if should_ping {
-                        debug!("pinging {}", relay.relay.url);
-                        relay.relay.ping();
-                        relay.last_ping = Instant::now();
-                    }
-                }
-
-                RelayStatus::Connecting => {
-                    // cool story bro
-                }
             }
         }
     }
 
     pub fn send_to(&mut self, cmd: &ClientMessage, relay_url: &str) {
         for relay in &mut self.relays {
-            let relay = &mut relay.relay;
+            if relay.url() == relay_url {
-            if relay.url == relay_url {
+                if let Err(err) = relay.send(cmd) {
-                relay.send(cmd);
+                    error!("error sending {:?} to {}: {err}", cmd, relay_url);
+                }
                 return;
             }
         }
@@ -182,7 +275,7 @@ impl RelayPool {
             return Ok(());
         }
         let relay = Relay::new(url, wakeup)?;
-        let pool_relay = PoolRelay::new(relay);
+        let pool_relay = PoolRelay::websocket(relay);
 
         self.relays.push(pool_relay);
 
@@ -202,7 +295,7 @@ impl RelayPool {
 
     pub fn remove_urls(&mut self, urls: &BTreeSet<String>) {
         self.relays
-            .retain(|pool_relay| !urls.contains(&pool_relay.relay.url));
+            .retain(|pool_relay| !urls.contains(pool_relay.url()));
     }
 
     // standardize the format (ie, trailing slashes)
@@ -219,32 +312,47 @@ impl RelayPool {
     /// If no message is received from any relays, None is returned.
     pub fn try_recv(&mut self) -> Option<PoolEvent<'_>> {
         for relay in &mut self.relays {
-            let relay = &mut relay.relay;
+            if let PoolRelay::Multicast(mcr) = relay {
-            if let Some(event) = relay.receiver.try_recv() {
+                // try rejoin on multicast
+                if mcr.should_rejoin() {
+                    if let Err(err) = mcr.rejoin() {
+                        error!("multicast: rejoin error: {err}");
+                    } else {
+                        debug!("multicast: rejoin success");
+                    }
+                }
+            }
+
+            if let Some(event) = relay.try_recv() {
                 match &event {
                     WsEvent::Opened => {
-                        relay.status = RelayStatus::Connected;
+                        relay.set_status(RelayStatus::Connected);
                     }
                     WsEvent::Closed => {
-                        relay.status = RelayStatus::Disconnected;
+                        relay.set_status(RelayStatus::Disconnected);
                     }
                     WsEvent::Error(err) => {
                         error!("{:?}", err);
-                        relay.status = RelayStatus::Disconnected;
+                        relay.set_status(RelayStatus::Disconnected);
                     }
                     WsEvent::Message(ev) => {
                         // let's just handle pongs here.
                         // We only need to do this natively.
                         #[cfg(not(target_arch = "wasm32"))]
                         if let WsMessage::Ping(ref bs) = ev {
-                            debug!("pong {}", &relay.url);
+                            debug!("pong {}", relay.url());
-                            relay.sender.send(WsMessage::Pong(bs.to_owned()));
+                            match relay {
+                                PoolRelay::Websocket(wsr) => {
+                                    wsr.relay.sender.send(WsMessage::Pong(bs.to_owned()));
+                                }
+                                PoolRelay::Multicast(_mcr) => {}
+                            }
                         }
                     }
                 }
                 return Some(PoolEvent {
                     event,
-                    relay: &relay.url,
+                    relay: relay.url(),
                 });
             }
         }

crates/notedeck/src/accounts.rs

@@ -517,13 +517,18 @@ impl Accounts {
         debug!("desired relays: {:?}", desired_relays);
 
         let add: BTreeSet<String> = desired_relays.difference(&pool.urls()).cloned().collect();
-        let sub: BTreeSet<String> = pool.urls().difference(&desired_relays).cloned().collect();
+        let mut sub: BTreeSet<String> = pool.urls().difference(&desired_relays).cloned().collect();
         if !add.is_empty() {
             debug!("configuring added relays: {:?}", add);
             let _ = pool.add_urls(add, wakeup);
         }
         if !sub.is_empty() {
             debug!("removing unwanted relays: {:?}", sub);
+
+            // certain relays are persistent like the multicast relay,
+            // although we should probably have a way to explicitly
+            // disable it
+            sub.remove("multicast");
             pool.remove_urls(&sub);
         }
 

crates/notedeck_chrome/src/app.rs

@@ -10,7 +10,7 @@ use nostrdb::{Config, Ndb, Transaction};
 use std::cell::RefCell;
 use std::path::Path;
 use std::rc::Rc;
-use tracing::info;
+use tracing::{error, info};
 
 /// Our browser app state
 pub struct Notedeck {
@@ -182,7 +182,13 @@ impl Notedeck {
         }
 
         // AccountManager will setup the pool on first update
-        let pool = RelayPool::new();
+        let mut pool = RelayPool::new();
+        {
+            let ctx = ctx.clone();
+            if let Err(err) = pool.add_multicast_relay(move || ctx.request_repaint()) {
+                error!("error setting up multicast relay: {err}");
+            }
+        }
 
         let img_cache = ImageCache::new(imgcache_dir);
         let note_cache = NoteCache::default();

crates/notedeck_columns/src/app.rs

@@ -19,7 +19,7 @@ use crate::{
 
 use notedeck::{Accounts, AppContext, DataPath, DataPathType, FilterState, ImageCache, UnknownIds};
 
-use enostr::{ClientMessage, Keypair, Pubkey, RelayEvent, RelayMessage, RelayPool};
+use enostr::{ClientMessage, Keypair, PoolRelay, Pubkey, RelayEvent, RelayMessage, RelayPool};
 use uuid::Uuid;
 
 use egui_extras::{Size, StripBuilder};
@@ -124,7 +124,9 @@ fn try_process_event(
             RelayEvent::Closed => warn!("{} connection closed", &ev.relay),
             RelayEvent::Error(e) => error!("{}: {}", &ev.relay, e),
             RelayEvent::Other(msg) => trace!("other event {:?}", &msg),
-            RelayEvent::Message(msg) => process_message(damus, app_ctx, &ev.relay, &msg),
+            RelayEvent::Message(msg) => {
+                process_message(damus, app_ctx, &ev.relay, &msg);
+            }
         }
     }
 
@@ -212,16 +214,6 @@ fn update_damus(damus: &mut Damus, app_ctx: &mut AppContext<'_>, ctx: &egui::Con
     }
 }
 
-fn process_event(ndb: &Ndb, _subid: &str, event: &str) {
-    #[cfg(feature = "profiling")]
-    puffin::profile_function!();
-
-    //info!("processing event {}", event);
-    if let Err(_err) = ndb.process_event(event) {
-        error!("error processing event {}", event);
-    }
-}
-
 fn handle_eose(
     damus: &mut Damus,
     ctx: &mut AppContext<'_>,
@@ -314,7 +306,29 @@ fn handle_eose(
 
 fn process_message(damus: &mut Damus, ctx: &mut AppContext<'_>, relay: &str, msg: &RelayMessage) {
     match msg {
-        RelayMessage::Event(subid, ev) => process_event(ctx.ndb, subid, ev),
+        RelayMessage::Event(_subid, ev) => {
+            let relay = if let Some(relay) = ctx.pool.relays.iter().find(|r| r.url() == relay) {
+                relay
+            } else {
+                error!("couldn't find relay {} for note processing!?", relay);
+                return;
+            };
+
+            match relay {
+                PoolRelay::Websocket(_) => {
+                    //info!("processing event {}", event);
+                    if let Err(err) = ctx.ndb.process_event(ev) {
+                        error!("error processing event {ev}: {err}");
+                    }
+                }
+                PoolRelay::Multicast(_) => {
+                    // multicast events are client events
+                    if let Err(err) = ctx.ndb.process_client_event(ev) {
+                        error!("error processing multicast event {ev}: {err}");
+                    }
+                }
+            }
+        }
         RelayMessage::Notice(msg) => warn!("Notice from {}: {}", relay, msg),
         RelayMessage::OK(cr) => info!("OK {:?}", cr),
         RelayMessage::Eose(sid) => {

crates/notedeck_columns/src/relay_pool_manager.rs

@@ -9,7 +9,7 @@ pub struct RelayPoolManager<'a> {
 
 pub struct RelayInfo<'a> {
     pub relay_url: &'a str,
-    pub status: &'a RelayStatus,
+    pub status: RelayStatus,
 }
 
 impl<'a> RelayPoolManager<'a> {
@@ -22,8 +22,8 @@ impl<'a> RelayPoolManager<'a> {
             .relays
             .iter()
             .map(|relay| RelayInfo {
-                relay_url: &relay.relay.url,
+                relay_url: relay.url(),
-                status: &relay.relay.status,
+                status: relay.status(),
             })
             .collect()
     }

crates/notedeck_columns/src/timeline/mod.rs

@@ -15,7 +15,7 @@ use std::fmt;
 use std::sync::atomic::{AtomicU32, Ordering};
 
 use egui_virtual_list::VirtualList;
-use enostr::{Pubkey, Relay, RelayPool};
+use enostr::{PoolRelay, Pubkey, RelayPool};
 use nostrdb::{Filter, Ndb, Note, Subscription, Transaction};
 use std::cell::RefCell;
 use std::hash::Hash;
@@ -423,7 +423,7 @@ pub fn setup_new_timeline(
     }
 
     for relay in &mut pool.relays {
-        send_initial_timeline_filter(ndb, since_optimize, subs, &mut relay.relay, timeline);
+        send_initial_timeline_filter(ndb, since_optimize, subs, relay, timeline);
     }
 }
 
@@ -440,11 +440,7 @@ pub fn send_initial_timeline_filters(
     relay_id: &str,
 ) -> Option<()> {
     info!("Sending initial filters to {}", relay_id);
-    let relay = &mut pool
+    let relay = &mut pool.relays.iter_mut().find(|r| r.url() == relay_id)?;
-        .relays
-        .iter_mut()
-        .find(|r| r.relay.url == relay_id)?
-        .relay;
 
     for timeline in columns.timelines_mut() {
         send_initial_timeline_filter(ndb, since_optimize, subs, relay, timeline);
@@ -457,10 +453,10 @@ pub fn send_initial_timeline_filter(
     ndb: &Ndb,
     can_since_optimize: bool,
     subs: &mut Subscriptions,
-    relay: &mut Relay,
+    relay: &mut PoolRelay,
     timeline: &mut Timeline,
 ) {
-    let filter_state = timeline.filter.get(&relay.url);
+    let filter_state = timeline.filter.get(relay.url());
 
     match filter_state {
         FilterState::Broken(err) => {
@@ -510,7 +506,9 @@ pub fn send_initial_timeline_filter(
             let sub_id = subscriptions::new_sub_id();
             subs.subs.insert(sub_id.clone(), SubKind::Initial);
 
-            relay.subscribe(sub_id, new_filters);
+            if let Err(err) = relay.subscribe(sub_id, new_filters) {
+                error!("error subscribing: {err}");
+            }
         }
 
         // we need some data first
@@ -524,7 +522,7 @@ fn fetch_contact_list(
     filter: Vec<Filter>,
     ndb: &Ndb,
     subs: &mut Subscriptions,
-    relay: &mut Relay,
+    relay: &mut PoolRelay,
     timeline: &mut Timeline,
 ) {
     let sub_kind = SubKind::FetchingContactList(timeline.id);
@@ -532,14 +530,16 @@ fn fetch_contact_list(
     let local_sub = ndb.subscribe(&filter).expect("sub");
 
     timeline.filter.set_relay_state(
-        relay.url.clone(),
+        relay.url().to_string(),
         FilterState::fetching_remote(sub_id.clone(), local_sub),
     );
 
     subs.subs.insert(sub_id.clone(), sub_kind);
 
-    info!("fetching contact list from {}", &relay.url);
+    info!("fetching contact list from {}", relay.url());
-    relay.subscribe(sub_id, filter);
+    if let Err(err) = relay.subscribe(sub_id, filter) {
+        error!("error subscribing: {err}");
+    }
 }
 
 fn setup_initial_timeline(

crates/notedeck_columns/src/ui/note/post.rs

@@ -6,7 +6,6 @@ use egui::widgets::text_edit::TextEdit;
 use egui::{Frame, Layout};
 use enostr::{FilledKeypair, FullKeypair, NoteId, RelayPool};
 use nostrdb::{Ndb, Transaction};
-use tracing::info;
 
 use notedeck::{ImageCache, NoteCache};
 
@@ -62,9 +61,7 @@ impl PostAction {
             }
         };
 
-        let raw_msg = format!("[\"EVENT\",{}]", note.json().unwrap());
+        pool.send(&enostr::ClientMessage::event(note));
-        info!("sending {}", raw_msg);
-        pool.send(&enostr::ClientMessage::raw(raw_msg));
         drafts.get_from_post_type(&self.post_type).clear();
 
         Ok(())

crates/notedeck_columns/src/ui/relay.rs

@@ -104,7 +104,7 @@ impl<'a> RelayView<'a> {
     }
 }
 
-fn get_right_side_width(status: &RelayStatus) -> f32 {
+fn get_right_side_width(status: RelayStatus) -> f32 {
     match status {
         RelayStatus::Connected => 150.0,
         RelayStatus::Connecting => 160.0,
@@ -138,7 +138,7 @@ fn relay_frame(ui: &mut Ui) -> Frame {
         .stroke(ui.style().visuals.noninteractive().bg_stroke)
 }
 
-fn show_connection_status(ui: &mut Ui, status: &RelayStatus) {
+fn show_connection_status(ui: &mut Ui, status: RelayStatus) {
     let fg_color = match status {
         RelayStatus::Connected => ui.visuals().selection.bg_fill,
         RelayStatus::Connecting => ui.visuals().warn_fg_color,
@@ -163,7 +163,7 @@ fn show_connection_status(ui: &mut Ui, status: &RelayStatus) {
     });
 }
 
-fn get_connection_icon(status: &RelayStatus) -> egui::Image<'static> {
+fn get_connection_icon(status: RelayStatus) -> egui::Image<'static> {
     let img_data = match status {
         RelayStatus::Connected => {
             egui::include_image!("../../../../assets/icons/connected_icon_4x.png")