feat: init mDNS discovery module

examples/discovery/mDNS/mDNS.py

@@ -0,0 +1,36 @@
+import secrets
+import multiaddr
+import trio
+
+from libp2p import new_host
+from libp2p.crypto.secp256k1 import create_new_key_pair
+
+async def main():
+    # Generate a key pair for the host
+    secret = secrets.token_bytes(32)
+    key_pair = create_new_key_pair(secret)
+
+    # Listen on a random TCP port
+    listen_addr = multiaddr.Multiaddr("/ip4/0.0.0.0/tcp/0")
+
+    # Enable mDNS discovery
+    host = new_host(key_pair=key_pair, enable_mDNS=True)
+
+    async with host.run(listen_addrs=[listen_addr]):
+        print("Host started!")
+        print("Peer ID:", host.get_id())
+        print("Listening on:", [str(addr) for addr in host.get_addrs()])
+
+        # Print discovered peers via mDNS
+        print("Waiting for mDNS peer discovery events (Ctrl+C to exit)...")
+        try:
+            while True:
+                # Print all known peers every 5 seconds
+                peers = host.get_peerstore().peer_ids()
+                print("Known peers:", [str(p) for p in peers if p != host.get_id()])
+                await trio.sleep(5)
+        except KeyboardInterrupt:
+            print("Exiting...")
+
+if __name__ == "__main__":
+    trio.run(main)