mirror of
https://github.com/varun-r-mallya/py-libp2p.git
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75 lines
2.1 KiB
Python
75 lines
2.1 KiB
Python
import argparse
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import logging
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import secrets
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import multiaddr
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import trio
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from libp2p import (
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new_host,
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)
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from libp2p.abc import PeerInfo
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from libp2p.crypto.secp256k1 import (
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create_new_key_pair,
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)
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from libp2p.discovery.events.peerDiscovery import peerDiscovery
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logger = logging.getLogger("libp2p.discovery.mdns")
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logger.setLevel(logging.INFO)
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handler = logging.StreamHandler()
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handler.setFormatter(
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logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
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)
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logger.addHandler(handler)
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# Set root logger to DEBUG to capture all logs from dependencies
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logging.getLogger().setLevel(logging.DEBUG)
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def onPeerDiscovery(peerinfo: PeerInfo):
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logger.info(f"Discovered: {peerinfo.peer_id}")
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async def run(port: int) -> None:
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secret = secrets.token_bytes(32)
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key_pair = create_new_key_pair(secret)
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listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/tcp/{port}")
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peerDiscovery.register_peer_discovered_handler(onPeerDiscovery)
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print(
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"Run this from the same folder in another console to "
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"start another peer on a different port:\n\n"
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"mdns-demo -p <ANOTHER_PORT>\n"
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)
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print("Waiting for mDNS peer discovery events...\n")
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logger.info("Starting peer Discovery")
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host = new_host(key_pair=key_pair, enable_mDNS=True)
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async with host.run(listen_addrs=[listen_addr]):
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await trio.sleep_forever()
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def main() -> None:
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description = """
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This program demonstrates mDNS peer discovery using libp2p.
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To use it, run 'mdns-demo -p <PORT>', where <PORT> is the port number.
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Start multiple peers on different ports to see discovery in action.
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"""
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parser = argparse.ArgumentParser(description=description)
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parser.add_argument("-p", "--port", default=0, type=int, help="source port number")
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parser.add_argument(
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"-v", "--verbose", action="store_true", help="Enable verbose output"
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)
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args = parser.parse_args()
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if args.verbose:
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logger.setLevel(logging.DEBUG)
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try:
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trio.run(run, args.port)
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except KeyboardInterrupt:
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logger.info("Exiting...")
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if __name__ == "__main__":
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main()
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