初步提交

Author: BenDerPan

.gitignore

@@ -10,3 +10,7 @@
 
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
+.idea/
+.DS_Store
+.vs/
+build/

main.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/libp2p/go-libp2p"
+	"github.com/libp2p/go-libp2p-crypto"
+	"github.com/libp2p/go-libp2p-kad-dht"
+	"github.com/multiformats/go-multiaddr"
+	mrand "math/rand"
+	"os"
+)
+
+func main() {
+	help := flag.Bool("help", false, "Display Help")
+	listenHost := flag.String("host", "0.0.0.0", "The bootstrap node host listen address\n")
+	port := flag.Int("port", 4001, "The bootstrap node listen port")
+	flag.Parse()
+
+	if *help {
+		fmt.Printf("This is a simple bootstrap node for kad-dht application using libp2p\n\n")
+		fmt.Printf("Usage: \n   Run './bootnode'\nor Run './bootnode -host [host] -port [port]'\n")
+
+		os.Exit(0)
+	}
+
+	fmt.Printf("[*] Listening on: %s with port: %d\n", *listenHost, *port)
+
+	ctx := context.Background()
+	r := mrand.New(mrand.NewSource(int64(*port)))
+
+	// Creates a new RSA key pair for this host.
+	prvKey, _, err := crypto.GenerateKeyPairWithReader(crypto.RSA, 2048, r)
+	if err != nil {
+		panic(err)
+	}
+
+	// 0.0.0.0 will listen on any interface device.
+	sourceMultiAddr, _ := multiaddr.NewMultiaddr(fmt.Sprintf("/ip4/%s/tcp/%d", *listenHost, *port))
+
+	// libp2p.New constructs a new libp2p Host.
+	// Other options can be added here.
+	host, err := libp2p.New(
+		ctx,
+		libp2p.ListenAddrs(sourceMultiAddr),
+		libp2p.Identity(prvKey),
+	)
+
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = dht.New(ctx, host)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("")
+	fmt.Printf("[*] Your Bootstrap ID Is: /ip4/%s/tcp/%v/p2p/%s\n", *listenHost, *port, host.ID().Pretty())
+	fmt.Println("")
+	select {}
+}

readme.md

@@ -0,0 +1,21 @@
+This project is a simple implementation of kad-dht bootstrap node based on go-libp2p.
+
+### Useage:
+1. Run as default(bind on '0.0.0.0' port:4001):
+* for linux: `./bootnode.amdx64-linux`
+* for windows: `bootnode.amdx64-windows.exe`
+
+2. or Run with custom:
+* for linux: `./bootnode.amdx64-linux -host [host] -port [port]`
+* for windows: `bootnode.amdx64-windows.exe -host [host] -port [port]`
+
+example output:
+```
+[*] Listening on: 0.0.0.0 with port: 4001
+
+[*] Your Bootstrap ID Is: /ip4/0.0.0.0/tcp/4001/p2p/QmP2C45o2vZfy1JXWFZDUEzrQCigMtd4r3nesvArV8dFKd
+```
+
+3. Copy the bootstrap id to your bootstrap nodes list and enjoy.
+
+### Notice: for a test example with kad-dht, visit [go-libp2p-examples](https://github.com/libp2p/go-libp2p-examples/blob/master/chat-with-rendezvous/chat.go)