feat(p2p): increase max relay hops and improve gossip algorithm

Increase MAX_RELAY_HOPS from 2 to 5 for better message propagation. Update gossip algorithm to scale with connection count, using a minimum of 6 or 25% of eligible peers.

src/config/constants.js

@@ -18,7 +18,7 @@ const VERIFICATION_POW_PREFIX = "0000";
 
 const MAX_PEERS = parseInt(process.env.MAX_PEERS) || 50000;
 const MAX_MESSAGE_SIZE = parseInt(process.env.MAX_MESSAGE_SIZE) || 2048;
-const MAX_RELAY_HOPS = parseInt(process.env.MAX_RELAY_HOPS) || 2;
+const MAX_RELAY_HOPS = parseInt(process.env.MAX_RELAY_HOPS) || 5;
 const MAX_CONNECTIONS = parseInt(process.env.MAX_CONNECTIONS) || 15;
 
 const HEARTBEAT_INTERVAL = parseInt(process.env.HEARTBEAT_INTERVAL) || 30000;

src/p2p/relay.js

@@ -2,13 +2,15 @@ const relayMessage = (msg, sourceSocket, swarm, diagnostics) => {
   const data = JSON.stringify(msg) + "\n";
 
   // Gossip Subsampling:
-  // Instead of flooding everyone (which causes massive bandwidth usage with 50 connections),
-  // we relay to a random subset of peers (e.g., 6).
-  // This maintains "Epidemic" reach (O(log N)) while capping bandwidth.
-
-  const TARGET_GOSSIP_COUNT = 6;
+  // We relay to a subset of peers to prevent flooding, but scale with connection count.
+  // We use a minimum of 6 or 25% of eligible peers, whichever is larger.
+  
   const allSockets = Array.from(swarm.connections);
   const eligible = allSockets.filter((s) => s !== sourceSocket);
+  
+  const MIN_GOSSIP_COUNT = 6;
+  const GOSSIP_FACTOR = 0.25; // Relay to 25% of peers
+  const TARGET_GOSSIP_COUNT = Math.max(MIN_GOSSIP_COUNT, Math.ceil(eligible.length * GOSSIP_FACTOR));
 
   let targets = eligible;