mirror of
https://github.com/serai-dex/serai.git
synced 2024-09-29 01:41:28 +00:00
Move heartbeat_tributaries and handle_p2p to p2p.rs
This commit is contained in:
Luke Parker
parent
67951c4971
commit
80e5ca9328
4 changed files with 225 additions and 205 deletions
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@ -1,7 +1,7 @@
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use core::ops::Deref;
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use std::{
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sync::Arc,
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time::{SystemTime, Duration},
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time::Duration,
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collections::{VecDeque, HashMap},
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};
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@ -27,7 +27,7 @@ use tokio::{
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time::sleep,
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};
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use ::tributary::{ReadWrite, ProvidedError, TransactionKind, TransactionTrait, Block, Tributary};
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use ::tributary::{ProvidedError, TransactionKind, TransactionTrait, Block, Tributary};
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mod tributary;
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use crate::tributary::{
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@ -107,198 +107,6 @@ async fn add_tributary<D: Db, Pro: Processors, P: P2p>(
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.unwrap();
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}
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pub async fn heartbeat_tributaries<D: Db, P: P2p>(
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p2p: P,
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mut new_tributary: broadcast::Receiver<ActiveTributary<D, P>>,
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) {
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let ten_blocks_of_time =
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Duration::from_secs((10 * Tributary::<D, Transaction, P>::block_time()).into());
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let mut readers = vec![];
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loop {
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while let Ok(ActiveTributary { spec: _, tributary }) = {
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match new_tributary.try_recv() {
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Ok(tributary) => Ok(tributary),
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Err(broadcast::error::TryRecvError::Empty) => Err(()),
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Err(broadcast::error::TryRecvError::Lagged(_)) => {
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panic!("heartbeat_tributaries lagged to handle new_tributary")
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}
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Err(broadcast::error::TryRecvError::Closed) => panic!("new_tributary sender closed"),
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}
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} {
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readers.push(tributary.reader());
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}
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for tributary in &readers {
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let tip = tributary.tip();
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let block_time =
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SystemTime::UNIX_EPOCH + Duration::from_secs(tributary.time_of_block(&tip).unwrap_or(0));
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// Only trigger syncing if the block is more than a minute behind
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if SystemTime::now() > (block_time + Duration::from_secs(60)) {
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log::warn!("last known tributary block was over a minute ago");
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let mut msg = tip.to_vec();
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// Also include the timestamp so LibP2p doesn't flag this as an old message re-circulating
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let timestamp = SystemTime::now()
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.duration_since(SystemTime::UNIX_EPOCH)
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.expect("system clock is wrong")
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.as_secs();
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// Divide by the block time so if multiple parties send a Heartbeat, they're more likely to
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// overlap
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let time_unit = timestamp / u64::from(Tributary::<D, Transaction, P>::block_time());
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msg.extend(time_unit.to_le_bytes());
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P2p::broadcast(&p2p, P2pMessageKind::Heartbeat(tributary.genesis()), msg).await;
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}
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}
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// Only check once every 10 blocks of time
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sleep(ten_blocks_of_time).await;
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}
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}
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pub async fn handle_p2p<D: Db, P: P2p>(
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our_key: <Ristretto as Ciphersuite>::G,
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p2p: P,
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mut new_tributary: broadcast::Receiver<ActiveTributary<D, P>>,
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) {
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let channels = Arc::new(RwLock::new(HashMap::new()));
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tokio::spawn({
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let p2p = p2p.clone();
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let channels = channels.clone();
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async move {
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loop {
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let tributary = new_tributary.recv().await.unwrap();
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let genesis = tributary.spec.genesis();
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let (send, mut recv) = mpsc::unbounded_channel();
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channels.write().await.insert(genesis, send);
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tokio::spawn({
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let p2p = p2p.clone();
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async move {
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loop {
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let mut msg: Message<P> = recv.recv().await.unwrap();
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match msg.kind {
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P2pMessageKind::KeepAlive => {}
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P2pMessageKind::Tributary(msg_genesis) => {
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assert_eq!(msg_genesis, genesis);
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log::trace!("handling message for tributary {:?}", tributary.spec.set());
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if tributary.tributary.handle_message(&msg.msg).await {
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P2p::broadcast(&p2p, msg.kind, msg.msg).await;
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}
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}
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// TODO2: Rate limit this per timestamp
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// And/or slash on Heartbeat which justifies a response, since the node obviously
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// was offline and we must now use our bandwidth to compensate for them?
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P2pMessageKind::Heartbeat(msg_genesis) => {
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assert_eq!(msg_genesis, genesis);
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if msg.msg.len() != 40 {
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log::error!("validator sent invalid heartbeat");
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continue;
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}
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let p2p = p2p.clone();
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let spec = tributary.spec.clone();
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let reader = tributary.tributary.reader();
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// Spawn a dedicated task as this may require loading large amounts of data from
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// disk and take a notable amount of time
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tokio::spawn(async move {
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/*
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// Have sqrt(n) nodes reply with the blocks
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let mut responders = (tributary.spec.n() as f32).sqrt().floor() as u64;
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// Try to have at least 3 responders
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if responders < 3 {
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responders = tributary.spec.n().min(3).into();
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}
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*/
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// Have up to three nodes respond
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let responders = u64::from(spec.n().min(3));
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// Decide which nodes will respond by using the latest block's hash as a
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// mutually agreed upon entropy source
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// This isn't a secure source of entropy, yet it's fine for this
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let entropy = u64::from_le_bytes(reader.tip()[.. 8].try_into().unwrap());
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// If n = 10, responders = 3, we want `start` to be 0 ..= 7
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// (so the highest is 7, 8, 9)
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// entropy % (10 + 1) - 3 = entropy % 8 = 0 ..= 7
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let start =
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usize::try_from(entropy % (u64::from(spec.n() + 1) - responders)).unwrap();
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let mut selected = false;
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for validator in
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&spec.validators()[start .. (start + usize::try_from(responders).unwrap())]
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{
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if our_key == validator.0 {
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selected = true;
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break;
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}
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}
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if !selected {
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log::debug!("received heartbeat and not selected to respond");
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return;
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}
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log::debug!("received heartbeat and selected to respond");
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let mut latest = msg.msg[.. 32].try_into().unwrap();
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while let Some(next) = reader.block_after(&latest) {
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let mut res = reader.block(&next).unwrap().serialize();
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res.extend(reader.commit(&next).unwrap());
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// Also include the timestamp used within the Heartbeat
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res.extend(&msg.msg[32 .. 40]);
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p2p.send(msg.sender, P2pMessageKind::Block(spec.genesis()), res).await;
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latest = next;
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}
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});
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}
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P2pMessageKind::Block(msg_genesis) => {
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assert_eq!(msg_genesis, genesis);
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let mut msg_ref: &[u8] = msg.msg.as_ref();
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let Ok(block) = Block::<Transaction>::read(&mut msg_ref) else {
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log::error!("received block message with an invalidly serialized block");
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continue;
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};
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// Get just the commit
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msg.msg.drain(.. (msg.msg.len() - msg_ref.len()));
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msg.msg.drain((msg.msg.len() - 8) ..);
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let res = tributary.tributary.sync_block(block, msg.msg).await;
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log::debug!("received block from {:?}, sync_block returned {}", msg.sender, res);
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}
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}
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}
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}
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});
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}
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}
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});
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loop {
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let msg = p2p.receive().await;
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match msg.kind {
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P2pMessageKind::KeepAlive => {}
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P2pMessageKind::Tributary(genesis) => {
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if let Some(channel) = channels.read().await.get(&genesis) {
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channel.send(msg).unwrap();
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}
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}
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P2pMessageKind::Heartbeat(genesis) => {
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if let Some(channel) = channels.read().await.get(&genesis) {
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channel.send(msg).unwrap();
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}
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}
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P2pMessageKind::Block(genesis) => {
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if let Some(channel) = channels.read().await.get(&genesis) {
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channel.send(msg).unwrap();
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}
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}
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}
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}
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}
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async fn publish_signed_transaction<D: Db, P: P2p>(
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db: &mut D,
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tributary: &Tributary<D, Transaction, P>,
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@ -1075,10 +883,14 @@ pub async fn run<D: Db, Pro: Processors, P: P2p>(
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// Spawn the heartbeat task, which will trigger syncing if there hasn't been a Tributary block
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// in a while (presumably because we're behind)
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tokio::spawn(heartbeat_tributaries(p2p.clone(), new_tributary_listener_3));
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tokio::spawn(p2p::heartbeat_tributaries_task(p2p.clone(), new_tributary_listener_3));
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// Handle P2P messages
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tokio::spawn(handle_p2p(Ristretto::generator() * key.deref(), p2p, new_tributary_listener_4));
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tokio::spawn(p2p::handle_p2p_task(
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Ristretto::generator() * key.deref(),
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p2p,
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new_tributary_listener_4,
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));
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// Handle all messages from processors
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handle_processors(raw_db, key, serai, processors, new_tributary_listener_5).await;
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@ -1,9 +1,21 @@
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use core::{time::Duration, fmt};
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use std::{sync::Arc, time::Instant, io::Read};
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use std::{
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sync::Arc,
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io::Read,
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collections::HashMap,
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time::{SystemTime, Instant},
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};
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use async_trait::async_trait;
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use tokio::sync::{mpsc, Mutex};
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use ciphersuite::{Ciphersuite, Ristretto};
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use serai_db::Db;
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use tokio::{
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sync::{Mutex, RwLock, mpsc, broadcast},
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time::sleep,
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};
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use libp2p::{
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futures::StreamExt,
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@ -20,7 +32,9 @@ use libp2p::{
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swarm::{NetworkBehaviour, SwarmBuilder, SwarmEvent, Swarm},
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};
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pub use tributary::P2p as TributaryP2p;
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pub(crate) use tributary::{ReadWrite, P2p as TributaryP2p};
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use crate::{Transaction, Block, Tributary, ActiveTributary};
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// TODO: Use distinct topics
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const LIBP2P_TOPIC: &str = "serai-coordinator";
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@ -366,3 +380,195 @@ impl TributaryP2p for LibP2p {
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<Self as P2p>::broadcast(self, P2pMessageKind::Tributary(genesis), msg).await
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}
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}
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pub async fn heartbeat_tributaries_task<D: Db, P: P2p>(
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p2p: P,
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mut new_tributary: broadcast::Receiver<ActiveTributary<D, P>>,
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) {
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let ten_blocks_of_time =
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Duration::from_secs((10 * Tributary::<D, Transaction, P>::block_time()).into());
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let mut readers = vec![];
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loop {
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while let Ok(ActiveTributary { spec: _, tributary }) = {
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match new_tributary.try_recv() {
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Ok(tributary) => Ok(tributary),
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Err(broadcast::error::TryRecvError::Empty) => Err(()),
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Err(broadcast::error::TryRecvError::Lagged(_)) => {
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panic!("heartbeat_tributaries lagged to handle new_tributary")
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}
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Err(broadcast::error::TryRecvError::Closed) => panic!("new_tributary sender closed"),
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}
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} {
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readers.push(tributary.reader());
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}
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for tributary in &readers {
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let tip = tributary.tip();
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let block_time =
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SystemTime::UNIX_EPOCH + Duration::from_secs(tributary.time_of_block(&tip).unwrap_or(0));
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// Only trigger syncing if the block is more than a minute behind
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if SystemTime::now() > (block_time + Duration::from_secs(60)) {
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log::warn!("last known tributary block was over a minute ago");
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let mut msg = tip.to_vec();
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// Also include the timestamp so LibP2p doesn't flag this as an old message re-circulating
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let timestamp = SystemTime::now()
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.duration_since(SystemTime::UNIX_EPOCH)
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.expect("system clock is wrong")
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.as_secs();
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// Divide by the block time so if multiple parties send a Heartbeat, they're more likely to
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// overlap
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let time_unit = timestamp / u64::from(Tributary::<D, Transaction, P>::block_time());
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msg.extend(time_unit.to_le_bytes());
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P2p::broadcast(&p2p, P2pMessageKind::Heartbeat(tributary.genesis()), msg).await;
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}
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}
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// Only check once every 10 blocks of time
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sleep(ten_blocks_of_time).await;
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}
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}
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pub async fn handle_p2p_task<D: Db, P: P2p>(
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our_key: <Ristretto as Ciphersuite>::G,
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p2p: P,
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mut new_tributary: broadcast::Receiver<ActiveTributary<D, P>>,
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) {
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let channels = Arc::new(RwLock::new(HashMap::new()));
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tokio::spawn({
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let p2p = p2p.clone();
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let channels = channels.clone();
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async move {
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loop {
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let tributary = new_tributary.recv().await.unwrap();
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let genesis = tributary.spec.genesis();
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let (send, mut recv) = mpsc::unbounded_channel();
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channels.write().await.insert(genesis, send);
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tokio::spawn({
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let p2p = p2p.clone();
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async move {
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loop {
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let mut msg: Message<P> = recv.recv().await.unwrap();
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match msg.kind {
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P2pMessageKind::KeepAlive => {}
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P2pMessageKind::Tributary(msg_genesis) => {
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assert_eq!(msg_genesis, genesis);
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log::trace!("handling message for tributary {:?}", tributary.spec.set());
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if tributary.tributary.handle_message(&msg.msg).await {
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P2p::broadcast(&p2p, msg.kind, msg.msg).await;
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}
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}
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|
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// TODO2: Rate limit this per timestamp
|
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// And/or slash on Heartbeat which justifies a response, since the node obviously
|
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// was offline and we must now use our bandwidth to compensate for them?
|
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P2pMessageKind::Heartbeat(msg_genesis) => {
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assert_eq!(msg_genesis, genesis);
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if msg.msg.len() != 40 {
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log::error!("validator sent invalid heartbeat");
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continue;
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}
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let p2p = p2p.clone();
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let spec = tributary.spec.clone();
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let reader = tributary.tributary.reader();
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// Spawn a dedicated task as this may require loading large amounts of data from
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// disk and take a notable amount of time
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tokio::spawn(async move {
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/*
|
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// Have sqrt(n) nodes reply with the blocks
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let mut responders = (tributary.spec.n() as f32).sqrt().floor() as u64;
|
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// Try to have at least 3 responders
|
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if responders < 3 {
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responders = tributary.spec.n().min(3).into();
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}
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*/
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|
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// Have up to three nodes respond
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let responders = u64::from(spec.n().min(3));
|
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|
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// Decide which nodes will respond by using the latest block's hash as a
|
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// mutually agreed upon entropy source
|
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// This isn't a secure source of entropy, yet it's fine for this
|
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let entropy = u64::from_le_bytes(reader.tip()[.. 8].try_into().unwrap());
|
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// If n = 10, responders = 3, we want `start` to be 0 ..= 7
|
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// (so the highest is 7, 8, 9)
|
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// entropy % (10 + 1) - 3 = entropy % 8 = 0 ..= 7
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let start =
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usize::try_from(entropy % (u64::from(spec.n() + 1) - responders)).unwrap();
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let mut selected = false;
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for validator in
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&spec.validators()[start .. (start + usize::try_from(responders).unwrap())]
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{
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if our_key == validator.0 {
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selected = true;
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break;
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}
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}
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if !selected {
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log::debug!("received heartbeat and not selected to respond");
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return;
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}
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log::debug!("received heartbeat and selected to respond");
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let mut latest = msg.msg[.. 32].try_into().unwrap();
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while let Some(next) = reader.block_after(&latest) {
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let mut res = reader.block(&next).unwrap().serialize();
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res.extend(reader.commit(&next).unwrap());
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// Also include the timestamp used within the Heartbeat
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res.extend(&msg.msg[32 .. 40]);
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p2p.send(msg.sender, P2pMessageKind::Block(spec.genesis()), res).await;
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latest = next;
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}
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});
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}
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P2pMessageKind::Block(msg_genesis) => {
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assert_eq!(msg_genesis, genesis);
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let mut msg_ref: &[u8] = msg.msg.as_ref();
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let Ok(block) = Block::<Transaction>::read(&mut msg_ref) else {
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log::error!("received block message with an invalidly serialized block");
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continue;
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};
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// Get just the commit
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msg.msg.drain(.. (msg.msg.len() - msg_ref.len()));
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msg.msg.drain((msg.msg.len() - 8) ..);
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let res = tributary.tributary.sync_block(block, msg.msg).await;
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log::debug!("received block from {:?}, sync_block returned {}", msg.sender, res);
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||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
loop {
|
||||
let msg = p2p.receive().await;
|
||||
match msg.kind {
|
||||
P2pMessageKind::KeepAlive => {}
|
||||
P2pMessageKind::Tributary(genesis) => {
|
||||
if let Some(channel) = channels.read().await.get(&genesis) {
|
||||
channel.send(msg).unwrap();
|
||||
}
|
||||
}
|
||||
P2pMessageKind::Heartbeat(genesis) => {
|
||||
if let Some(channel) = channels.read().await.get(&genesis) {
|
||||
channel.send(msg).unwrap();
|
||||
}
|
||||
}
|
||||
P2pMessageKind::Block(genesis) => {
|
||||
if let Some(channel) = channels.read().await.get(&genesis) {
|
||||
channel.send(msg).unwrap();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -13,7 +13,8 @@ use tributary::Tributary;
|
|||
|
||||
use crate::{
|
||||
tributary::Transaction,
|
||||
ActiveTributary, handle_p2p,
|
||||
ActiveTributary,
|
||||
p2p::handle_p2p_task,
|
||||
tests::{
|
||||
LocalP2p,
|
||||
tributary::{new_keys, new_spec, new_tributaries},
|
||||
|
|
@ -33,7 +34,7 @@ async fn handle_p2p_test() {
|
|||
let tributary = Arc::new(tributary);
|
||||
tributary_arcs.push(tributary.clone());
|
||||
let (new_tributary_send, new_tributary_recv) = broadcast::channel(5);
|
||||
tokio::spawn(handle_p2p(Ristretto::generator() * *keys[i], p2p, new_tributary_recv));
|
||||
tokio::spawn(handle_p2p_task(Ristretto::generator() * *keys[i], p2p, new_tributary_recv));
|
||||
new_tributary_send
|
||||
.send(ActiveTributary { spec: spec.clone(), tributary })
|
||||
.map_err(|_| "failed to send ActiveTributary")
|
||||
|
|
|
|||
|
|
@ -13,7 +13,8 @@ use tributary::Tributary;
|
|||
|
||||
use crate::{
|
||||
tributary::Transaction,
|
||||
ActiveTributary, handle_p2p, heartbeat_tributaries,
|
||||
ActiveTributary,
|
||||
p2p::{heartbeat_tributaries_task, handle_p2p_task},
|
||||
tests::{
|
||||
LocalP2p,
|
||||
tributary::{new_keys, new_spec, new_tributaries},
|
||||
|
|
@ -42,7 +43,7 @@ async fn sync_test() {
|
|||
tributary_arcs.push(tributary.clone());
|
||||
let (new_tributary_send, new_tributary_recv) = broadcast::channel(5);
|
||||
let thread =
|
||||
tokio::spawn(handle_p2p(Ristretto::generator() * *keys[i], p2p, new_tributary_recv));
|
||||
tokio::spawn(handle_p2p_task(Ristretto::generator() * *keys[i], p2p, new_tributary_recv));
|
||||
new_tributary_send
|
||||
.send(ActiveTributary { spec: spec.clone(), tributary })
|
||||
.map_err(|_| "failed to send ActiveTributary")
|
||||
|
|
@ -77,7 +78,7 @@ async fn sync_test() {
|
|||
let syncer_key = Ristretto::generator() * *syncer_key;
|
||||
let syncer_tributary = Arc::new(syncer_tributary);
|
||||
let (syncer_tributary_send, syncer_tributary_recv) = broadcast::channel(5);
|
||||
tokio::spawn(handle_p2p(syncer_key, syncer_p2p.clone(), syncer_tributary_recv));
|
||||
tokio::spawn(handle_p2p_task(syncer_key, syncer_p2p.clone(), syncer_tributary_recv));
|
||||
syncer_tributary_send
|
||||
.send(ActiveTributary { spec: spec.clone(), tributary: syncer_tributary.clone() })
|
||||
.map_err(|_| "failed to send ActiveTributary to syncer")
|
||||
|
|
@ -95,7 +96,7 @@ async fn sync_test() {
|
|||
|
||||
// Start the heartbeat protocol
|
||||
let (syncer_heartbeat_tributary_send, syncer_heartbeat_tributary_recv) = broadcast::channel(5);
|
||||
tokio::spawn(heartbeat_tributaries(syncer_p2p, syncer_heartbeat_tributary_recv));
|
||||
tokio::spawn(heartbeat_tributaries_task(syncer_p2p, syncer_heartbeat_tributary_recv));
|
||||
syncer_heartbeat_tributary_send
|
||||
.send(ActiveTributary { spec: spec.clone(), tributary: syncer_tributary.clone() })
|
||||
.map_err(|_| "failed to send ActiveTributary to heartbeat")
|
||||
|
|
|
|||
Loading…
Reference in a new issue