Added bootstrap module

libp2p/__init__.py

@@ -249,6 +249,7 @@ def new_host(
     muxer_preference: Literal["YAMUX", "MPLEX"] | None = None,
     listen_addrs: Sequence[multiaddr.Multiaddr] | None = None,
     enable_mDNS: bool = False,
+    bootstrap: list[str] | None = None,
 ) -> IHost:
     """
     Create a new libp2p host based on the given parameters.
@@ -261,6 +262,7 @@ def new_host(
     :param muxer_preference: optional explicit muxer preference
     :param listen_addrs: optional list of multiaddrs to listen on
     :param enable_mDNS: whether to enable mDNS discovery
+    :param bootstrap: optional list of bootstrap peer addresses as strings
     :return: return a host instance
     """
     swarm = new_swarm(
@@ -273,7 +275,7 @@ def new_host(
     )
 
     if disc_opt is not None:
-        return RoutedHost(swarm, disc_opt, enable_mDNS)
-    return BasicHost(swarm, enable_mDNS)
+        return RoutedHost(swarm, disc_opt, enable_mDNS, bootstrap)
+    return BasicHost(swarm, enable_mDNS, bootstrap)
 
 __version__ = __version("libp2p")

libp2p/discovery/bootstrap/__init__.py

@@ -0,0 +1,5 @@
+"""Bootstrap peer discovery module for py-libp2p."""
+
+from .bootstrap import BootstrapDiscovery
+
+__all__ = ["BootstrapDiscovery"]

libp2p/discovery/bootstrap/bootstrap.py

@@ -0,0 +1,69 @@
+import logging
+
+from multiaddr import Multiaddr
+
+from libp2p.abc import INetworkService
+from libp2p.discovery.events.peerDiscovery import peerDiscovery
+from libp2p.peer.peerinfo import info_from_p2p_addr
+
+logger = logging.getLogger("libp2p.discovery.bootstrap")
+
+
+class BootstrapDiscovery:
+    """
+    Bootstrap-based peer discovery for py-libp2p.
+    Connects to predefined bootstrap peers and adds them to peerstore.
+    """
+
+    def __init__(self, swarm: INetworkService, bootstrap_addrs: list[str]):
+        self.swarm = swarm
+        self.peerstore = swarm.peerstore
+        self.bootstrap_addrs = bootstrap_addrs or []
+        self.discovered_peers: set[str] = set()
+
+    def start(self) -> None:
+        """Process bootstrap addresses and emit peer discovery events."""
+        logger.debug(
+            f"Starting bootstrap discovery with "
+            f"{len(self.bootstrap_addrs)} bootstrap addresses"
+        )
+
+        for addr_str in self.bootstrap_addrs:
+            try:
+                self._process_bootstrap_addr(addr_str)
+            except Exception as e:
+                logger.warning(f"Failed to process bootstrap address {addr_str}: {e}")
+
+    def stop(self) -> None:
+        """Clean up bootstrap discovery resources."""
+        logger.debug("Stopping bootstrap discovery")
+        self.discovered_peers.clear()
+
+    def _process_bootstrap_addr(self, addr_str: str) -> None:
+        """Convert string address to PeerInfo and add to peerstore."""
+        # Convert string to Multiaddr
+        multiaddr = Multiaddr(addr_str)
+
+        # Extract peer info from multiaddr
+        peer_info = info_from_p2p_addr(multiaddr)
+
+        # Skip if it's our own peer
+        if peer_info.peer_id == self.swarm.get_peer_id():
+            logger.debug(f"Skipping own peer ID: {peer_info.peer_id}")
+            return
+
+        # Skip if already discovered
+        if str(peer_info.peer_id) in self.discovered_peers:
+            logger.debug(f"Peer already discovered: {peer_info.peer_id}")
+            return
+
+        # Add to peerstore with TTL (using same pattern as mDNS)
+        self.peerstore.add_addrs(peer_info.peer_id, peer_info.addrs, 10)
+
+        # Track discovered peer
+        self.discovered_peers.add(str(peer_info.peer_id))
+
+        # Emit peer discovery event
+        peerDiscovery.emit_peer_discovered(peer_info)
+
+        logger.info(f"Discovered bootstrap peer: {peer_info.peer_id}")

libp2p/discovery/bootstrap/utils.py

@@ -0,0 +1,51 @@
+"""Utility functions for bootstrap discovery."""
+
+import logging
+
+from multiaddr import Multiaddr
+
+from libp2p.peer.peerinfo import InvalidAddrError, PeerInfo, info_from_p2p_addr
+
+logger = logging.getLogger("libp2p.discovery.bootstrap.utils")
+
+
+def validate_bootstrap_addresses(addrs: list[str]) -> list[str]:
+    """
+    Validate and filter bootstrap addresses.
+
+    :param addrs: List of bootstrap address strings
+    :return: List of valid bootstrap addresses
+    """
+    valid_addrs = []
+
+    for addr_str in addrs:
+        try:
+            # Try to parse as multiaddr
+            multiaddr = Multiaddr(addr_str)
+
+            # Try to extract peer info (this validates the p2p component)
+            info_from_p2p_addr(multiaddr)
+
+            valid_addrs.append(addr_str)
+            logger.debug(f"Valid bootstrap address: {addr_str}")
+
+        except (InvalidAddrError, ValueError, Exception) as e:
+            logger.warning(f"Invalid bootstrap address '{addr_str}': {e}")
+            continue
+
+    return valid_addrs
+
+
+def parse_bootstrap_peer_info(addr_str: str) -> PeerInfo | None:
+    """
+    Parse bootstrap address string into PeerInfo.
+
+    :param addr_str: Bootstrap address string
+    :return: PeerInfo object or None if parsing fails
+    """
+    try:
+        multiaddr = Multiaddr(addr_str)
+        return info_from_p2p_addr(multiaddr)
+    except Exception as e:
+        logger.error(f"Failed to parse bootstrap address '{addr_str}': {e}")
+        return None

libp2p/host/basic_host.py

@@ -29,6 +29,7 @@ from libp2p.custom_types import (
     StreamHandlerFn,
     TProtocol,
 )
+from libp2p.discovery.bootstrap.bootstrap import BootstrapDiscovery
 from libp2p.discovery.mdns.mdns import MDNSDiscovery
 from libp2p.host.defaults import (
     get_default_protocols,
@@ -91,6 +92,7 @@ class BasicHost(IHost):
         self,
         network: INetworkService,
         enable_mDNS: bool = False,
+        bootstrap: list[str] | None = None,
         default_protocols: Optional["OrderedDict[TProtocol, StreamHandlerFn]"] = None,
     ) -> None:
         self._network = network
@@ -102,6 +104,8 @@ class BasicHost(IHost):
         self.multiselect_client = MultiselectClient()
         if enable_mDNS:
             self.mDNS = MDNSDiscovery(network)
+        if bootstrap:
+            self.bootstrap = BootstrapDiscovery(network, bootstrap)
 
     def get_id(self) -> ID:
         """
@@ -169,11 +173,16 @@ class BasicHost(IHost):
                 if hasattr(self, "mDNS") and self.mDNS is not None:
                     logger.debug("Starting mDNS Discovery")
                     self.mDNS.start()
+                if hasattr(self, "bootstrap") and self.bootstrap is not None:
+                    logger.debug("Starting Bootstrap Discovery")
+                    self.bootstrap.start()
                 try:
                     yield
                 finally:
                     if hasattr(self, "mDNS") and self.mDNS is not None:
                         self.mDNS.stop()
+                    if hasattr(self, "bootstrap") and self.bootstrap is not None:
+                        self.bootstrap.stop()
 
         return _run()
 

libp2p/host/routed_host.py

@@ -19,9 +19,13 @@ class RoutedHost(BasicHost):
     _router: IPeerRouting
 
     def __init__(
-        self, network: INetworkService, router: IPeerRouting, enable_mDNS: bool = False
+        self,
+        network: INetworkService,
+        router: IPeerRouting,
+        enable_mDNS: bool = False,
+        bootstrap: list[str] | None = None,
     ):
-        super().__init__(network, enable_mDNS)
+        super().__init__(network, enable_mDNS, bootstrap)
         self._router = router
 
     async def connect(self, peer_info: PeerInfo) -> None: