go-libp2p: Go implementation of libp2p networking

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/libp2p/go-libp2p"
	"github.com/libp2p/go-libp2p/core/host"
	"github.com/libp2p/go-libp2p/core/peer"
	"github.com/multiformats/go-multiaddr"
)

func main() {
	ctx := context.Background()

	// Create a libp2p host with default settings
	node, err := libp2p.New(
		libp2p.ListenAddrStrings("/ip4/0.0.0.0/tcp/0"),
	)
	if err != nil {
		log.Fatal(err)
	}
	defer node.Close()

	// Print the node's peer ID and listening addresses
	fmt.Printf("Peer ID: %s\n", node.ID())
	fmt.Println("Listening addresses:")
	for _, addr := range node.Addrs() {
		fmt.Printf("  %s/p2p/%s\n", addr, node.ID())
	}

	// Connect to another peer (example address)
	targetAddr, _ := multiaddr.NewMultiaddr("/ip4/127.0.0.1/tcp/4001/p2p/QmSomePeerID")
	peerInfo, _ := peer.AddrInfoFromP2pAddr(targetAddr)
	
	err = node.Connect(ctx, *peerInfo)
	if err != nil {
		fmt.Printf("Failed to connect: %v\n", err)
	} else {
		fmt.Printf("Connected to peer: %s\n", peerInfo.ID)
	}

	// Keep the program running
	select {}
}