script/research/crdt: implement base structs for p2p

script/research/crdt/Cargo.lock

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+
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+checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
+
+[[package]]
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+checksum = "685404d509889fade3e86fe3a5803bca2ec09b0c0778d5ada6ec8bf7a8de5259"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "log",
+ "wepoll-ffi",
+ "winapi",
 ]
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.36"
@@ -27,6 +769,62 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
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+ "rand_core",
+]
+
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+dependencies = [
+ "getrandom",
+]
+
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+checksum = "8380fe0152551244f0747b1bf41737e0f8a74f97a14ccefd1148187271634f3c"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
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+checksum = "7776223e2696f1aa4c6b0170e83212f47296a00424305117d013dfe86fb0fe55"
+dependencies = [
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+ "redox_syscall",
+ "thiserror",
+]
+
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+
 [[package]]
 name = "serde"
 version = "1.0.136"
@@ -47,6 +845,87 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "serde_json"
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+ "ryu",
+ "serde",
+]
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+dependencies = [
+ "libc",
+ "signal-hook-registry",
+]
+
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+dependencies = [
+ "libc",
+]
+
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+]
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+
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+checksum = "85cf3b5351f3e783c1d79ab5fc604eeed8b8ae9abd36b166e8b87a089efd85e4"
+dependencies = [
+ "async-channel",
+ "async-executor",
+ "async-fs",
+ "async-io",
+ "async-lock",
+ "async-net",
+ "async-process",
+ "blocking",
+ "futures-lite",
+ "once_cell",
+]
+
+[[package]]
+name = "socket2"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66d72b759436ae32898a2af0a14218dbf55efde3feeb170eb623637db85ee1e0"
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+ "libc",
+ "winapi",
+]
+
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+
 [[package]]
 name = "syn"
 version = "1.0.89"
@@ -58,8 +937,248 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "termcolor"
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+
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+dependencies = [
+ "thiserror-impl",
+]
+
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script/research/crdt/Cargo.toml

@@ -5,8 +5,29 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+
+[dependencies.darkfi]
+path = "../../../"
+features = ["net"]
+
 [dependencies]
 serde = {version = "1.0.136", features = ["derive"]}
+# Async
+smol = "1.2.5"
+futures = "0.3.21"
+async-std = "1.10.0"
+async-trait = "0.1.52"
+async-channel = "1.6.1"
+async-executor = "1.4.1"
+easy-parallel = "3.2.0"
+
+# Crypto
+rand = "0.8.5"
+
+# Misc
+clap = "3.1.6"
+log = "0.4.14"
+simplelog = "0.11.2"
 
 
 [workspace]

script/research/crdt/src/event.rs

@@ -0,0 +1,30 @@
+use std::cmp::Ordering;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq, PartialOrd)]
+pub struct Event<T: Clone> {
+    // the msg in the event
+    pub value: T,
+    // the counter for lamport clock
+    pub counter: u64,
+    // It might be necessary to attach the node's name to the timestamp
+    // so that it is possible to differentiate between events
+    pub name: String,
+}
+
+impl<T: Clone> Event<T> {
+    pub fn new(value: &T, counter: u64, name: String) -> Self {
+        Self { value: value.clone(), counter, name }
+    }
+}
+
+impl<T: Eq + PartialOrd + Clone> Ord for Event<T> {
+    fn cmp(&self, other: &Self) -> Ordering {
+        let ord = self.counter.cmp(&other.counter);
+        if ord == Ordering::Equal {
+            return self.name.cmp(&other.name)
+        }
+        ord
+    }
+}

script/research/crdt/src/gset.rs

@@ -1,67 +1,9 @@
-use std::{
-    cmp::{max, Ordering},
-    collections::BTreeSet,
-};
+use std::collections::BTreeSet;
 
 use serde::{Deserialize, Serialize};
 
 // CRDT using gset and lamport clock
 
-#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
-struct Node<T: Ord + Clone> {
-    // name to idnetifie the node
-    name: String,
-    // a grow-only set
-    gset: GSet<Event<T>>,
-    // a counter for the node
-    time: u64,
-}
-
-impl<T: Ord + Clone> Node<T> {
-    pub fn new(name: &str) -> Self {
-        Self { name: name.into(), gset: GSet::new(), time: 0 }
-    }
-
-    pub fn receive_event(&mut self, event: &Event<T>) {
-        self.time = max(self.time, event.counter) + 1;
-        self.gset.insert(event);
-    }
-
-    pub fn send_event(&mut self, value: &T) -> Event<T> {
-        self.time += 1;
-        let event = Event::new(value, self.time, self.name.clone());
-        self.gset.insert(&event);
-        event
-    }
-}
-
-#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq, PartialOrd)]
-struct Event<T: Clone> {
-    // the msg in the event
-    value: T,
-    // the counter for lamport clock
-    counter: u64,
-    // It might be necessary to attach the node's name to the timestamp
-    // so that it is possible to differentiate between events
-    name: String,
-}
-
-impl<T: Clone> Event<T> {
-    pub fn new(value: &T, counter: u64, name: String) -> Self {
-        Self { value: value.clone(), counter, name }
-    }
-}
-
-impl<T: Eq + PartialOrd + Clone> Ord for Event<T> {
-    fn cmp(&self, other: &Self) -> Ordering {
-        let ord = self.counter.cmp(&other.counter);
-        if ord == Ordering::Equal {
-            return self.name.cmp(&other.name)
-        }
-        ord
-    }
-}
-
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
 pub struct GSet<T: Ord> {
     set: BTreeSet<T>,
@@ -94,67 +36,3 @@ impl<T: Ord + Clone> Default for GSet<T> {
         Self::new()
     }
 }
-
-#[cfg(test)]
-mod tests {
-
-    use super::*;
-
-    fn sync_simulation(
-        mut a: Node<String>,
-        mut b: Node<String>,
-        mut c: Node<String>,
-    ) -> (Node<String>, Node<String>, Node<String>) {
-        a.gset.merge(&b.gset);
-        a.gset.merge(&c.gset);
-
-        b.gset.merge(&a.gset);
-        b.gset.merge(&c.gset);
-
-        c.gset.merge(&a.gset);
-        c.gset.merge(&b.gset);
-
-        (a, b, c)
-    }
-
-    #[test]
-    fn test_crdt_gset() {
-        let mut a: Node<String> = Node::new("Node A");
-        let mut b: Node<String> = Node::new("Node B");
-        let mut c: Node<String> = Node::new("Node C");
-
-        // node a
-        a.send_event(&"a_msg1".to_string());
-        a.send_event(&"a_msg2".to_string());
-
-        // node b
-        b.send_event(&"b_msg1".to_string());
-
-        // node c
-        c.send_event(&"c_msg1".to_string());
-
-        // node b
-        b.send_event(&"b_msg2".to_string());
-
-        let (a, mut b, mut c) = sync_simulation(a, b, c);
-
-        assert_eq!(a.gset.len(), 5);
-        assert_eq!(b.gset.len(), 5);
-        assert_eq!(c.gset.len(), 5);
-
-        // node c
-        c.send_event(&"c_msg2".to_string());
-        c.send_event(&"c_msg3".to_string());
-        c.send_event(&"c_msg4".to_string());
-        c.send_event(&"c_msg5".to_string());
-
-        // node b
-        b.send_event(&"b_msg3".to_string());
-
-        let (a, b, c) = sync_simulation(a, b, c);
-
-        assert_eq!(a.gset.len(), 10);
-        assert_eq!(b.gset.len(), 10);
-        assert_eq!(c.gset.len(), 10);
-    }
-}

script/research/crdt/src/lib.rs

@@ -1 +1,73 @@
+pub mod event;
 pub mod gset;
+pub mod net;
+pub mod node;
+
+pub use event::Event;
+pub use gset::GSet;
+pub use net::CrdtP2p;
+pub use node::Node;
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+
+    fn sync_simulation(
+        mut a: Node<String>,
+        mut b: Node<String>,
+        mut c: Node<String>,
+    ) -> (Node<String>, Node<String>, Node<String>) {
+        a.gset.merge(&b.gset);
+        a.gset.merge(&c.gset);
+
+        b.gset.merge(&a.gset);
+        b.gset.merge(&c.gset);
+
+        c.gset.merge(&a.gset);
+        c.gset.merge(&b.gset);
+
+        (a, b, c)
+    }
+
+    #[test]
+    fn test_crdt_gset() {
+        let mut a: Node<String> = Node::new("Node A");
+        let mut b: Node<String> = Node::new("Node B");
+        let mut c: Node<String> = Node::new("Node C");
+
+        // node a
+        a.send_event(&"a_msg1".to_string());
+        a.send_event(&"a_msg2".to_string());
+
+        // node b
+        b.send_event(&"b_msg1".to_string());
+
+        // node c
+        c.send_event(&"c_msg1".to_string());
+
+        // node b
+        b.send_event(&"b_msg2".to_string());
+
+        let (a, mut b, mut c) = sync_simulation(a, b, c);
+
+        assert_eq!(a.gset.len(), 5);
+        assert_eq!(b.gset.len(), 5);
+        assert_eq!(c.gset.len(), 5);
+
+        // node c
+        c.send_event(&"c_msg2".to_string());
+        c.send_event(&"c_msg3".to_string());
+        c.send_event(&"c_msg4".to_string());
+        c.send_event(&"c_msg5".to_string());
+
+        // node b
+        b.send_event(&"b_msg3".to_string());
+
+        let (a, b, c) = sync_simulation(a, b, c);
+
+        assert_eq!(a.gset.len(), 10);
+        assert_eq!(b.gset.len(), 10);
+        assert_eq!(c.gset.len(), 10);
+    }
+}

script/research/crdt/src/main.rs

@@ -1,3 +1,42 @@
-fn main() {
-    println!("Hello, world!");
+use std::sync::Arc;
+
+extern crate clap;
+use async_executor::Executor;
+use easy_parallel::Parallel;
+use simplelog::{ColorChoice, Config, LevelFilter, TermLogger, TerminalMode};
+
+use darkfi::Result;
+
+use crdt::CrdtP2p;
+
+fn main() -> Result<()> {
+    let ex = Arc::new(Executor::new());
+    let (signal, shutdown) = async_channel::unbounded::<()>();
+
+    let ex2 = ex.clone();
+
+    TermLogger::init(
+        LevelFilter::Debug,
+        Config::default(),
+        TerminalMode::Mixed,
+        ColorChoice::Auto,
+    )?;
+
+    // let nthreads = num_cpus::get();
+    // debug!(target: "IRC DAEMON", "Run {} executor threads", nthreads);
+
+    let (sender, _) = async_channel::unbounded::<crdt::net::Event>();
+
+    let (_, result) = Parallel::new()
+        .each(0..4, |_| smol::future::block_on(ex.run(shutdown.recv())))
+        // Run the main future on the current thread.
+        .finish(|| {
+            smol::future::block_on(async move {
+                CrdtP2p::start(ex2.clone(), sender).await?;
+                drop(signal);
+                Ok::<(), darkfi::Error>(())
+            })
+        });
+
+    result
 }

script/research/crdt/src/net.rs

@@ -0,0 +1,122 @@
+use async_executor::Executor;
+use async_trait::async_trait;
+
+use darkfi::{
+    net,
+    util::serial::{Decodable, Encodable},
+    Result,
+};
+use log::debug;
+use std::{io, sync::Arc};
+
+pub struct CrdtP2p {}
+
+impl CrdtP2p {
+    pub async fn start(
+        executor: Arc<Executor<'_>>,
+        notify_queue_sender: async_channel::Sender<Event>,
+    ) -> Result<()> {
+        let p2p = net::P2p::new(net::Settings::default()).await;
+        let registry = p2p.protocol_registry();
+
+        registry
+            .register(!net::SESSION_SEED, move |channel, p2p| {
+                let sender = notify_queue_sender.clone();
+                async move { ProtocolCrdt::init(channel, sender, p2p).await }
+            })
+            .await;
+
+        //
+        // p2p network main instance
+        //
+        // Performs seed session
+        p2p.clone().start(executor.clone()).await?;
+        // Actual main p2p session
+        p2p.run(executor).await
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct Event {}
+
+impl net::Message for Event {
+    fn name() -> &'static str {
+        "event"
+    }
+}
+
+impl Encodable for Event {
+    fn encode<S: io::Write>(&self, mut _s: S) -> Result<usize> {
+        let len = 0;
+        Ok(len)
+    }
+}
+
+impl Decodable for Event {
+    fn decode<D: io::Read>(mut _d: D) -> Result<Self> {
+        Ok(Self {})
+    }
+}
+
+struct ProtocolCrdt {
+    jobsman: net::ProtocolJobsManagerPtr,
+    notify_queue_sender: async_channel::Sender<Event>,
+    event_sub: net::MessageSubscription<Event>,
+    p2p: net::P2pPtr,
+}
+
+impl ProtocolCrdt {
+    pub async fn init(
+        channel: net::ChannelPtr,
+        notify_queue_sender: async_channel::Sender<Event>,
+        p2p: net::P2pPtr,
+    ) -> net::ProtocolBasePtr {
+        let message_subsytem = channel.get_message_subsystem();
+        message_subsytem.add_dispatch::<Event>().await;
+
+        let event_sub = channel.subscribe_msg::<Event>().await.expect("Missing Event dispatcher!");
+
+        Arc::new(Self {
+            notify_queue_sender,
+            event_sub,
+            jobsman: net::ProtocolJobsManager::new("ProtocolCrdt", channel),
+            p2p,
+        })
+    }
+
+    async fn handle_receive_event(self: Arc<Self>) -> Result<()> {
+        debug!(target: "crdt", "ProtocolCrdt::handle_receive_event() [START]");
+        loop {
+            let event = self.event_sub.receive().await?;
+
+            debug!(
+                target: "ircd",
+                "ProtocolCrdt::handle_receive_event() received {:?}",
+                event
+            );
+
+            let event = (*event).clone();
+            self.p2p.broadcast(event.clone()).await?;
+
+            self.notify_queue_sender.send(event).await?;
+        }
+    }
+}
+
+#[async_trait]
+impl net::ProtocolBase for ProtocolCrdt {
+    /// Starts ping-pong keep-alive messages exchange. Runs ping-pong in the
+    /// protocol task manager, then queues the reply. Sends out a ping and
+    /// waits for pong reply. Waits for ping and replies with a pong.
+    async fn start(self: Arc<Self>, executor: Arc<Executor<'_>>) -> Result<()> {
+        debug!(target: "crdt", "ProtocolCrdt::start() [START]");
+        self.jobsman.clone().start(executor.clone());
+        self.jobsman.clone().spawn(self.clone().handle_receive_event(), executor.clone()).await;
+        debug!(target: "crdt", "ProtocolCrdt::start() [END]");
+        Ok(())
+    }
+
+    fn name(&self) -> &'static str {
+        "ProtocolCrdt"
+    }
+}

script/research/crdt/src/node.rs

@@ -0,0 +1,33 @@
+use std::cmp::max;
+
+use serde::{Deserialize, Serialize};
+
+use crate::{Event, GSet};
+
+#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
+pub struct Node<T: Ord + Clone> {
+    // name to idnetifie the node
+    name: String,
+    // a grow-only set
+    pub(crate) gset: GSet<Event<T>>,
+    // a counter for the node
+    time: u64,
+}
+
+impl<T: Ord + Clone> Node<T> {
+    pub fn new(name: &str) -> Self {
+        Self { name: name.into(), gset: GSet::new(), time: 0 }
+    }
+
+    pub fn receive_event(&mut self, event: &Event<T>) {
+        self.time = max(self.time, event.counter) + 1;
+        self.gset.insert(event);
+    }
+
+    pub fn send_event(&mut self, value: &T) -> Event<T> {
+        self.time += 1;
+        let event = Event::new(value, self.time, self.name.clone());
+        self.gset.insert(&event);
+        event
+    }
+}