feat(node): wire P2pSender into block_loop; add --p2p-addr and --bootstrap CLI flags

src/block_loop.rs

@@ -9,8 +9,10 @@ use nu_mempool::Mempool;
 use nu_state::StateDb;
 use nu_vm::execute_block;
 
+use crate::p2p::P2pSender;
+
 const MAX_TX_PER_BLOCK: usize = 500;
-const BLOCK_INTERVAL_MS: u64  = 6_000; // one slot
+const BLOCK_INTERVAL_MS: u64  = 6_000;
 
 pub struct BlockLoopConfig {
     pub validator_addr: String,
@@ -21,6 +23,7 @@ pub async fn run(
     config:    BlockLoopConfig,
     db:        Arc<Mutex<StateDb>>,
     mempool:   Arc<Mutex<Mempool>>,
+    p2p:       Option<P2pSender>,
 ) {
     let mut ticker = interval(Duration::from_millis(BLOCK_INTERVAL_MS));
     let mut height: u64 = 1;
@@ -80,6 +83,8 @@ pub async fn run(
             }
         }
 
+        let hash = block_hash(&block);
+
         let block_key = format!("block:{height}");
         {
             let db_guard = db.lock().await;
@@ -88,7 +93,11 @@ pub async fn run(
             }
         }
 
-        prev_hash = block_hash(&block);
+        if let Some(ref sender) = p2p {
+            sender.send_block_announce(height, hash.clone());
+        }
+
+        prev_hash = hash;
 
         tracing::info!(
             slot,

src/main.rs

@@ -1,16 +1,19 @@
 mod block_loop;
+mod p2p;
 
 use std::sync::Arc;
 
 use anyhow::Result;
 use clap::Parser;
-use tokio::sync::Mutex;
+use tokio::sync::{mpsc, Mutex};
 use tracing_subscriber::EnvFilter;
 
 use nu_mempool::Mempool;
 use nu_rpc::server::RpcServer;
 use nu_state::StateDb;
 
+use p2p::{NodeP2pEvent, P2pSender};
+
 #[derive(Parser)]
 #[command(name = "nu-node", version)]
 struct Cli {
@@ -22,7 +25,7 @@ struct Cli {
     #[arg(long)]
     validator: bool,
 
-    /// Validator address (required when --validator is set)
+    /// Validator address
     #[arg(long, default_value = "0xDEV0000000000000000000000000000000000000")]
     validator_addr: String,
 
@@ -37,6 +40,14 @@ struct Cli {
     /// Chain identifier
     #[arg(long, default_value = "nu-devnet-1")]
     chain_id: String,
+
+    /// P2P listen address (empty = P2P disabled)
+    #[arg(long)]
+    p2p_addr: Option<String>,
+
+    /// Bootstrap peer multiaddrs
+    #[arg(long)]
+    bootstrap: Vec<String>,
 }
 
 #[tokio::main]
@@ -48,17 +59,42 @@ async fn main() -> Result<()> {
     let cli = Cli::parse();
 
     let db      = Arc::new(Mutex::new(StateDb::open(&cli.db_path)?));
-    tracing::info!("State DB opened at {}", cli.db_path);
-
     let mempool = Arc::new(Mutex::new(Mempool::new()));
 
-    // Spawn block production loop in dev mode
+    tracing::info!("State DB opened at {}", cli.db_path);
+
+    // P2P event channel — block_loop publishes, this node forwards to nu-p2p
+    let p2p_sender = if cli.p2p_addr.is_some() {
+        let (tx, mut rx) = mpsc::channel::<NodeP2pEvent>(128);
+        tokio::spawn(async move {
+            while let Some(event) = rx.recv().await {
+                match &event {
+                    NodeP2pEvent::BlockAnnounce { height, hash } => {
+                        tracing::info!(height, hash = %&hash[..8], "p2p: block announce");
+                    }
+                    NodeP2pEvent::TxGossip { raw_tx } => {
+                        tracing::debug!(bytes = raw_tx.len(), "p2p: tx gossip");
+                    }
+                }
+                // TODO Faz 1: forward to nu-p2p swarm via IPC or embedded swarm
+            }
+        });
+        Some(P2pSender(tx))
+    } else {
+        None
+    };
+
     if cli.dev && cli.validator {
         let cfg = block_loop::BlockLoopConfig {
             validator_addr: cli.validator_addr.clone(),
             chain_id:       cli.chain_id.clone(),
         };
-        tokio::spawn(block_loop::run(cfg, Arc::clone(&db), Arc::clone(&mempool)));
+        tokio::spawn(block_loop::run(
+            cfg,
+            Arc::clone(&db),
+            Arc::clone(&mempool),
+            p2p_sender.clone(),
+        ));
     }
 
     let rpc = RpcServer::new(
@@ -73,6 +109,7 @@ async fn main() -> Result<()> {
         rpc_addr  = %cli.rpc_addr,
         dev       = cli.dev,
         validator = cli.validator,
+        p2p       = cli.p2p_addr.as_deref().unwrap_or("disabled"),
         "nu-node ready"
     );
 

src/p2p.rs

@@ -0,0 +1,26 @@
+use serde::{Deserialize, Serialize};
+use tokio::sync::mpsc;
+
+/// Minimal P2P event types nu-node yayınlar.
+/// nu-p2p swarm bunları alıp gossipsub'a iletir.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "type", content = "data")]
+pub enum NodeP2pEvent {
+    BlockAnnounce { height: u64, hash: String },
+    TxGossip      { raw_tx: Vec<u8> },
+}
+
+/// Block loop ve RPC handler'larının P2P olaylarını göndermesini sağlar.
+/// Karşı uçta bir dinleyici yoksa (nu-p2p bağlı değilse) sessizce drop edilir.
+#[derive(Clone)]
+pub struct P2pSender(pub mpsc::Sender<NodeP2pEvent>);
+
+impl P2pSender {
+    pub fn send_block_announce(&self, height: u64, hash: String) {
+        let _ = self.0.try_send(NodeP2pEvent::BlockAnnounce { height, hash });
+    }
+
+    pub fn send_tx_gossip(&self, raw_tx: Vec<u8>) {
+        let _ = self.0.try_send(NodeP2pEvent::TxGossip { raw_tx });
+    }
+}