Added bootstrap module

examples/bootstrap/bootstrap.py

@@ -0,0 +1,121 @@
+import argparse
+import logging
+import secrets
+
+import multiaddr
+import trio
+
+from libp2p import new_host
+from libp2p.abc import PeerInfo
+from libp2p.crypto.secp256k1 import create_new_key_pair
+from libp2p.discovery.events.peerDiscovery import peerDiscovery
+
+# Configure logging
+logger = logging.getLogger("libp2p.discovery.bootstrap")
+logger.setLevel(logging.INFO)
+handler = logging.StreamHandler()
+handler.setFormatter(
+    logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
+)
+logger.addHandler(handler)
+
+# Set root logger to DEBUG to capture all logs
+logging.getLogger().setLevel(logging.DEBUG)
+
+
+def on_peer_discovery(peer_info: PeerInfo) -> None:
+    """Handler for peer discovery events."""
+    logger.info(f"🔍 Discovered peer: {peer_info.peer_id}")
+    logger.info(f"   Addresses: {[str(addr) for addr in peer_info.addrs]}")
+
+
+# Example bootstrap peers (you can replace with real bootstrap nodes)
+BOOTSTRAP_PEERS = [
+    # IPFS bootstrap nodes (examples - replace with actual working nodes)
+    "/ip4/104.131.131.82/tcp/4001/p2p/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SznbYGzPwp8qDrq",
+    "/ip6/2604:a880:1:20::203:d001/tcp/4001/p2p/QmSoLPppuBtQSGwKDZT2M73ULpjvfd3aZ6ha4oFGL1KrGM",
+]
+
+
+async def run(port: int, bootstrap_addrs: list[str]) -> None:
+    """Run the bootstrap discovery example."""
+    # Generate key pair
+    secret = secrets.token_bytes(32)
+    key_pair = create_new_key_pair(secret)
+
+    # Create listen address
+    listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
+
+    # Register peer discovery handler
+    peerDiscovery.register_peer_discovered_handler(on_peer_discovery)
+
+    logger.info("🚀 Starting Bootstrap Discovery Example")
+    logger.info(f"📍 Listening on: {listen_addr}")
+    logger.info(f"🌐 Bootstrap peers: {len(bootstrap_addrs)}")
+
+    print("\n" + "=" * 60)
+    print("Bootstrap Discovery Example")
+    print("=" * 60)
+    print("This example demonstrates connecting to bootstrap peers.")
+    print("Watch the logs for peer discovery events!")
+    print("Press Ctrl+C to exit.")
+    print("=" * 60)
+
+    # Create and run host with bootstrap discovery
+    host = new_host(key_pair=key_pair, bootstrap=bootstrap_addrs)
+
+    try:
+        async with host.run(listen_addrs=[listen_addr]):
+            # Keep running and log peer discovery events
+            await trio.sleep_forever()
+    except KeyboardInterrupt:
+        logger.info("👋 Shutting down...")
+
+
+def main() -> None:
+    """Main entry point."""
+    description = """
+    Bootstrap Discovery Example for py-libp2p
+
+    This example demonstrates how to use bootstrap peers for peer discovery.
+    Bootstrap peers are predefined peers that help new nodes join the network.
+
+    Usage:
+        python bootstrap.py -p 8000
+        python bootstrap.py -p 8001 --custom-bootstrap \\
+            "/ip4/127.0.0.1/tcp/8000/p2p/QmYourPeerID"
+    """
+
+    parser = argparse.ArgumentParser(
+        description=description, formatter_class=argparse.RawDescriptionHelpFormatter
+    )
+    parser.add_argument(
+        "-p", "--port", default=0, type=int, help="Port to listen on (default: random)"
+    )
+    parser.add_argument(
+        "--custom-bootstrap",
+        nargs="*",
+        help="Custom bootstrap addresses (space-separated)",
+    )
+    parser.add_argument(
+        "-v", "--verbose", action="store_true", help="Enable verbose output"
+    )
+
+    args = parser.parse_args()
+
+    if args.verbose:
+        logger.setLevel(logging.DEBUG)
+
+    # Use custom bootstrap addresses if provided, otherwise use defaults
+    bootstrap_addrs = (
+        args.custom_bootstrap if args.custom_bootstrap else BOOTSTRAP_PEERS
+    )
+
+    try:
+        trio.run(run, args.port, bootstrap_addrs)
+    except KeyboardInterrupt:
+        logger.info("Exiting...")
+
+
+if __name__ == "__main__":
+    main()