feat(gossipsub): allow compiling for WASM

This modification removes deprecated dependency `wasm_timer` and enables wasm compatibility on the gossibsup protocol by simply substituting the `wasm_timer::Instant` with `instant::Instant`(which supports `fn checked_add`) and `wasm_timer::Interval` with `futures_ticker::Ticker`.

Pull-Request: #3973.

Author: onur-ozkan

Cargo.lock

@@ -15,7 +15,7 @@ either = "1.5"
 fnv = "1.0"
 futures = { version = "0.3.28", features = ["executor", "thread-pool"] }
 futures-timer = "3"
-instant = "0.1.11"
+instant = "0.1.12"
 libp2p-identity = { workspace = true, features = ["peerid", "ed25519"] }
 log = "0.4"
 multiaddr = { version = "0.17.1" }

core/Cargo.toml

@@ -80,7 +80,7 @@ tcp = ["dep:libp2p-tcp"]
 tls = ["dep:libp2p-tls"]
 tokio = ["libp2p-swarm/tokio", "libp2p-mdns?/tokio", "libp2p-tcp?/tokio", "libp2p-dns?/tokio", "libp2p-quic?/tokio", "libp2p-webrtc?/tokio"]
 uds = ["dep:libp2p-uds"]
-wasm-bindgen = ["futures-timer/wasm-bindgen", "instant/wasm-bindgen", "getrandom/js", "libp2p-swarm/wasm-bindgen"]
+wasm-bindgen = ["futures-timer/wasm-bindgen", "instant/wasm-bindgen", "getrandom/js", "libp2p-swarm/wasm-bindgen", "libp2p-gossipsub?/wasm-bindgen"]
 wasm-ext = ["dep:libp2p-wasm-ext"]
 wasm-ext-websocket = ["wasm-ext", "libp2p-wasm-ext?/websocket"]
 webrtc = ["dep:libp2p-webrtc", "libp2p-webrtc?/pem"]
@@ -92,14 +92,15 @@ bytes = "1"
 futures = "0.3.26"
 futures-timer = "3.0.2" # Explicit dependency to be used in `wasm-bindgen` feature
 getrandom = "0.2.3" # Explicit dependency to be used in `wasm-bindgen` feature
-instant = "0.1.11" # Explicit dependency to be used in `wasm-bindgen` feature
+instant = "0.1.12" # Explicit dependency to be used in `wasm-bindgen` feature
 
 libp2p-allow-block-list = { workspace = true }
 libp2p-autonat = { workspace = true, optional = true }
 libp2p-connection-limits = { workspace = true }
 libp2p-core = { workspace = true }
 libp2p-dcutr = { workspace = true, optional = true }
 libp2p-floodsub = { workspace = true, optional = true }
+libp2p-gossipsub = { workspace = true, optional = true }
 libp2p-identify = { workspace = true, optional = true }
 libp2p-identity = { workspace = true }
 libp2p-kad = { workspace = true, optional = true }
@@ -130,9 +131,6 @@ libp2p-uds = { workspace = true, optional = true }
 libp2p-webrtc = { workspace = true, optional = true }
 libp2p-websocket = { workspace = true, optional = true }
 
-[target.'cfg(not(target_os = "unknown"))'.dependencies]
-libp2p-gossipsub = { workspace = true, optional = true }
-
 [dev-dependencies]
 async-std = { version = "1.6.2", features = ["attributes"] }
 async-trait = "0.1"

libp2p/Cargo.toml

@@ -19,7 +19,7 @@ relay = ["libp2p-relay"]
 dcutr = ["libp2p-dcutr"]
 
 [dependencies]
-instant = "0.1.11"
+instant = "0.1.12"
 libp2p-core = { workspace = true }
 libp2p-dcutr =  { workspace = true, optional = true }
 libp2p-identify = { workspace = true, optional = true }

misc/metrics/Cargo.toml

@@ -15,7 +15,7 @@ asynchronous-codec = "0.6"
 either = "1.6.0"
 futures = "0.3.28"
 futures-timer = "3.0"
-instant = "0.1.11"
+instant = "0.1.12"
 libp2p-core = { workspace = true }
 libp2p-swarm = { workspace = true }
 libp2p-identity = { workspace = true }

protocols/dcutr/Cargo.toml

@@ -10,30 +10,35 @@ repository = "https://github.com/libp2p/rust-libp2p"
 keywords = ["peer-to-peer", "libp2p", "networking"]
 categories = ["network-programming", "asynchronous"]
 
+[features]
+wasm-bindgen = ["getrandom/js", "instant/wasm-bindgen"]
+
 [dependencies]
-either = "1.5"
-libp2p-swarm = { workspace = true }
-libp2p-core = { workspace = true }
-libp2p-identity = { workspace = true }
-bytes = "1.4"
+asynchronous-codec = "0.6"
+base64 = "0.21.0"
 byteorder = "1.3.4"
+bytes = "1.4"
+either = "1.5"
 fnv = "1.0.7"
 futures = "0.3.28"
-rand = "0.8"
-asynchronous-codec = "0.6"
-unsigned-varint = { version = "0.7.0", features = ["asynchronous_codec"] }
+futures-ticker = "0.0.3"
+getrandom = "0.2.9"
+hex_fmt = "0.3.0"
+instant = "0.1.12"
+libp2p-core = { workspace = true }
+libp2p-identity = { workspace = true }
+libp2p-swarm = { workspace = true }
 log = "0.4.11"
-sha2 = "0.10.0"
-base64 = "0.21.0"
-smallvec = "1.6.1"
 quick-protobuf = "0.8"
 quick-protobuf-codec = { workspace = true }
-hex_fmt = "0.3.0"
+rand = "0.8"
 regex = "1.8.1"
 serde = { version = "1", optional = true, features = ["derive"] }
-wasm-timer = "0.2.5"
-instant = "0.1.11"
+sha2 = "0.10.0"
+smallvec = "1.6.1"
+unsigned-varint = { version = "0.7.0", features = ["asynchronous_codec"] }
 void = "1.0.2"
+
 # Metrics dependencies
 prometheus-client = "0.21.0"
 

protocols/gossipsub/Cargo.toml

@@ -20,13 +20,13 @@
 
 //! Data structure for efficiently storing known back-off's when pruning peers.
 use crate::topic::TopicHash;
+use instant::Instant;
 use libp2p_identity::PeerId;
 use std::collections::{
     hash_map::{Entry, HashMap},
     HashSet,
 };
 use std::time::Duration;
-use wasm_timer::Instant;
 
 #[derive(Copy, Clone)]
 struct HeartbeatIndex(usize);

protocols/gossipsub/src/backoff.rs

@@ -30,10 +30,12 @@ use std::{
 };
 
 use futures::StreamExt;
+use futures_ticker::Ticker;
 use log::{debug, error, trace, warn};
 use prometheus_client::registry::Registry;
 use rand::{seq::SliceRandom, thread_rng};
 
+use instant::Instant;
 use libp2p_core::{multiaddr::Protocol::Ip4, multiaddr::Protocol::Ip6, Endpoint, Multiaddr};
 use libp2p_identity::Keypair;
 use libp2p_identity::PeerId;
@@ -43,7 +45,6 @@ use libp2p_swarm::{
     ConnectionDenied, ConnectionId, NetworkBehaviour, NotifyHandler, PollParameters, THandler,
     THandlerInEvent, THandlerOutEvent, ToSwarm,
 };
-use wasm_timer::Instant;
 
 use crate::backoff::BackoffStorage;
 use crate::config::{Config, ValidationMode};
@@ -67,7 +68,6 @@ use crate::{PublishError, SubscriptionError, ValidationError};
 use instant::SystemTime;
 use quick_protobuf::{MessageWrite, Writer};
 use std::{cmp::Ordering::Equal, fmt::Debug};
-use wasm_timer::Interval;
 
 #[cfg(test)]
 mod tests;
@@ -289,7 +289,7 @@ pub struct Behaviour<D = IdentityTransform, F = AllowAllSubscriptionFilter> {
     mcache: MessageCache,
 
     /// Heartbeat interval stream.
-    heartbeat: Interval,
+    heartbeat: Ticker,
 
     /// Number of heartbeats since the beginning of time; this allows us to amortize some resource
     /// clean up -- eg backoff clean up.
@@ -307,7 +307,7 @@ pub struct Behaviour<D = IdentityTransform, F = AllowAllSubscriptionFilter> {
 
     /// Stores optional peer score data together with thresholds, decay interval and gossip
     /// promises.
-    peer_score: Option<(PeerScore, PeerScoreThresholds, Interval, GossipPromises)>,
+    peer_score: Option<(PeerScore, PeerScoreThresholds, Ticker, GossipPromises)>,
 
     /// Counts the number of `IHAVE` received from each peer since the last heartbeat.
     count_received_ihave: HashMap<PeerId, usize>,
@@ -460,9 +460,9 @@ where
                 config.backoff_slack(),
             ),
             mcache: MessageCache::new(config.history_gossip(), config.history_length()),
-            heartbeat: Interval::new_at(
-                Instant::now() + config.heartbeat_initial_delay(),
+            heartbeat: Ticker::new_with_next(
                 config.heartbeat_interval(),
+                config.heartbeat_initial_delay(),
             ),
             heartbeat_ticks: 0,
             px_peers: HashSet::new(),
@@ -908,7 +908,7 @@ where
             return Err("Peer score set twice".into());
         }
 
-        let interval = Interval::new(params.decay_interval);
+        let interval = Ticker::new(params.decay_interval);
         let peer_score = PeerScore::new_with_message_delivery_time_callback(params, callback);
         self.peer_score = Some((peer_score, threshold, interval, GossipPromises::default()));
         Ok(())
@@ -1175,7 +1175,7 @@ where
     }
 
     fn score_below_threshold_from_scores(
-        peer_score: &Option<(PeerScore, PeerScoreThresholds, Interval, GossipPromises)>,
+        peer_score: &Option<(PeerScore, PeerScoreThresholds, Ticker, GossipPromises)>,
         peer_id: &PeerId,
         threshold: impl Fn(&PeerScoreThresholds) -> f64,
     ) -> (bool, f64) {
@@ -3472,12 +3472,12 @@ where
 
         // update scores
         if let Some((peer_score, _, interval, _)) = &mut self.peer_score {
-            while let Poll::Ready(Some(())) = interval.poll_next_unpin(cx) {
+            while let Poll::Ready(Some(_)) = interval.poll_next_unpin(cx) {
                 peer_score.refresh_scores();
             }
         }
 
-        while let Poll::Ready(Some(())) = self.heartbeat.poll_next_unpin(cx) {
+        while let Poll::Ready(Some(_)) = self.heartbeat.poll_next_unpin(cx) {
             self.heartbeat();
         }