"Just works" WASM (browser) experience

.github/workflows/ci.yml

@@ -39,6 +39,7 @@ jobs:
       matrix:
         toolchain: [
           wasm32-unknown-emscripten,
+          wasm32-unknown-unknown,
           wasm32-wasi
         ]
     container:
@@ -74,10 +75,17 @@ jobs:
         key: ${{ matrix.toolchain }}
 
     - name: Build on ${{ matrix.toolchain }}
+      if: matrix.toolchain != 'wasm32-unknown-unknown'
       # TODO: also run `cargo test`
       # TODO: ideally we would build `--workspace`, but not all crates compile for WASM
       run: cargo build --target=${{ matrix.toolchain }}
 
+    - name: Build on ${{ matrix.toolchain }}
+      if: matrix.toolchain == 'wasm32-unknown-unknown'
+      # TODO: also run `cargo test`
+      # TODO: ideally we would build `--workspace`, but not all crates compile for WASM
+      run: cargo build --target=${{ matrix.toolchain }} --features wasm-bindgen
+
   check-rustdoc-links:
     name: Check rustdoc intra-doc links
     runs-on: ubuntu-latest

Cargo.toml

@@ -53,7 +53,7 @@ rendezvous = ["libp2p-rendezvous"]
 tcp-async-io = ["libp2p-tcp", "libp2p-tcp/async-io"]
 tcp-tokio = ["libp2p-tcp", "libp2p-tcp/tokio"]
 uds = ["libp2p-uds"]
-wasm-bindgen = ["parking_lot/wasm-bindgen"]
+wasm-bindgen = ["futures-timer/wasm-bindgen", "instant/wasm-bindgen", "parking_lot/wasm-bindgen", "getrandom/js", "rand/wasm-bindgen"]
 wasm-ext = ["libp2p-wasm-ext"]
 wasm-ext-websocket = ["wasm-ext", "libp2p-wasm-ext/websocket"]
 websocket = ["libp2p-websocket"]
@@ -67,6 +67,12 @@ all-features = true
 atomic = "0.5.0"
 bytes = "1"
 futures = "0.3.1"
+# Explicit dependency to be used in `wasm-bindgen` feature
+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"
 lazy_static = "1.2"
 libp2p-core = { version = "0.30.0-rc.1", path = "core",  default-features = false }
 libp2p-floodsub = { version = "0.31.0-rc.1", path = "protocols/floodsub", optional = true }
@@ -88,10 +94,12 @@ libp2p-uds = { version = "0.30.0-rc.1", path = "transports/uds", optional = true
 libp2p-wasm-ext = { version = "0.30.0-rc.1", path = "transports/wasm-ext", default-features = false, optional = true }
 libp2p-yamux = { version = "0.34.0-rc.1", path = "muxers/yamux", optional = true }
 multiaddr = { version = "0.13.0-rc.1" }
-parking_lot = "0.11.0"
+# Explicit dependency to be used in `wasm-bindgen` feature
+parking_lot = "0.11.2"
 pin-project = "1.0.0"
+# Explicit dependency to be used in `wasm-bindgen` feature
+rand = "0.7.3"
 smallvec = "1.6.1"
-wasm-timer = "0.2.4"
 
 [target.'cfg(not(any(target_os = "emscripten", target_os = "wasi", target_os = "unknown")))'.dependencies]
 libp2p-deflate = { version = "0.30.0-rc.1", path = "transports/deflate", optional = true }

core/Cargo.toml

@@ -17,6 +17,7 @@ either = "1.5"
 fnv = "1.0"
 futures = { version = "0.3.1", features = ["executor", "thread-pool"] }
 futures-timer = "3"
+instant = "0.1.11"
 lazy_static = "1.2"
 libsecp256k1 = { version = "0.6.0", optional = true }
 log = "0.4"
@@ -47,7 +48,6 @@ libp2p-noise = { path = "../transports/noise" }
 libp2p-tcp = { path = "../transports/tcp" }
 multihash = { version = "0.14", default-features = false, features = ["arb"] }
 quickcheck = "0.9.0"
-wasm-timer = "0.2"
 
 [build-dependencies]
 prost-build = "0.9"

core/src/peer_record.rs

@@ -2,9 +2,9 @@ use crate::identity::error::SigningError;
 use crate::identity::Keypair;
 use crate::signed_envelope::SignedEnvelope;
 use crate::{peer_record_proto, signed_envelope, Multiaddr, PeerId};
+use instant::SystemTime;
 use std::convert::TryInto;
 use std::fmt;
-use std::time::SystemTime;
 
 const PAYLOAD_TYPE: &str = "/libp2p/routing-state-record";
 const DOMAIN_SEP: &str = "libp2p-routing-state";

protocols/gossipsub/Cargo.toml

@@ -18,7 +18,6 @@ fnv = "1.0.7"
 futures = "0.3.5"
 rand = "0.7.3"
 asynchronous-codec = "0.6"
-wasm-timer = "0.2.4"
 unsigned-varint = { version = "0.7.0", features = ["asynchronous_codec"] }
 log = "0.4.11"
 sha2 = "0.9.1"
@@ -27,6 +26,9 @@ smallvec = "1.6.1"
 prost = "0.9"
 hex_fmt = "0.3.0"
 regex = "1.4.0"
+futures-timer = "3.0.2"
+pin-project = "1.0.8"
+instant = "0.1.11"
 
 [dev-dependencies]
 async-std = "1.6.3"

protocols/gossipsub/src/backoff.rs

@@ -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_core::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/behaviour.rs

@@ -34,8 +34,8 @@ use futures::StreamExt;
 use log::{debug, error, trace, warn};
 use prost::Message;
 use rand::{seq::SliceRandom, thread_rng};
-use wasm_timer::{Instant, Interval};
 
+use instant::Instant;
 use libp2p_core::{
     connection::ConnectionId, identity::Keypair, multiaddr::Protocol::Ip4,
     multiaddr::Protocol::Ip6, ConnectedPoint, Multiaddr, PeerId,
@@ -45,7 +45,6 @@ use libp2p_swarm::{
     NotifyHandler, PollParameters,
 };
 
-use crate::backoff::BackoffStorage;
 use crate::config::{GossipsubConfig, ValidationMode};
 use crate::error::{PublishError, SubscriptionError, ValidationError};
 use crate::gossip_promises::GossipPromises;
@@ -62,6 +61,7 @@ use crate::types::{
     GossipsubSubscriptionAction, MessageAcceptance, MessageId, PeerInfo, RawGossipsubMessage,
 };
 use crate::types::{GossipsubRpc, PeerConnections, PeerKind};
+use crate::{backoff::BackoffStorage, interval::Interval};
 use crate::{rpc_proto, TopicScoreParams};
 use std::{cmp::Ordering::Equal, fmt::Debug};
 
@@ -406,8 +406,8 @@ where
                 config.backoff_slack(),
             ),
             mcache: MessageCache::new(config.history_gossip(), config.history_length()),
-            heartbeat: Interval::new_at(
-                Instant::now() + config.heartbeat_initial_delay(),
+            heartbeat: Interval::new_initial(
+                config.heartbeat_initial_delay(),
                 config.heartbeat_interval(),
             ),
             heartbeat_ticks: 0,

protocols/gossipsub/src/gossip_promises.rs

@@ -21,12 +21,12 @@
 use crate::error::ValidationError;
 use crate::peer_score::RejectReason;
 use crate::MessageId;
+use instant::Instant;
 use libp2p_core::PeerId;
 use log::debug;
 use rand::seq::SliceRandom;
 use rand::thread_rng;
 use std::collections::HashMap;
-use wasm_timer::Instant;
 
 /// Tracks recently sent `IWANT` messages and checks if peers respond to them
 /// for each `IWANT` message we track one random requested message id.

protocols/gossipsub/src/handler.rs

@@ -25,6 +25,7 @@ use crate::types::{GossipsubRpc, PeerKind, RawGossipsubMessage};
 use asynchronous_codec::Framed;
 use futures::prelude::*;
 use futures::StreamExt;
+use instant::Instant;
 use libp2p_core::upgrade::{InboundUpgrade, NegotiationError, OutboundUpgrade, UpgradeError};
 use libp2p_swarm::protocols_handler::{
     KeepAlive, ProtocolsHandler, ProtocolsHandlerEvent, ProtocolsHandlerUpgrErr, SubstreamProtocol,
@@ -39,7 +40,6 @@ use std::{
     task::{Context, Poll},
     time::Duration,
 };
-use wasm_timer::Instant;
 
 /// The initial time (in seconds) we set the keep alive for protocol negotiations to occur.
 const INITIAL_KEEP_ALIVE: u64 = 30;