forked from RedBird96/b7s
/
main.go
168 lines (138 loc) · 4.1 KB
/
main.go
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package main
import (
"bufio"
"context"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"os"
"os/user"
"path/filepath"
"github.com/libp2p/go-libp2p"
"github.com/libp2p/go-libp2p/core/crypto"
"github.com/libp2p/go-libp2p/core/host"
"github.com/libp2p/go-libp2p/core/network"
"github.com/rs/zerolog"
"github.com/spf13/pflag"
ma "github.com/multiformats/go-multiaddr"
)
type Message struct {
Type string `json:"type"`
Payload string `json:"payload"`
}
func main() {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
zerolog.SetGlobalLevel(zerolog.InfoLevel)
logger := zerolog.New(zerolog.ConsoleWriter{Out: os.Stderr}).With().Timestamp().Logger()
listenF := pflag.IntP("listen", "l", 0, "wait for incoming connections")
insecureF := pflag.BoolP("insecure", "i", false, "use an unencrypted connection")
privKeyPathF := pflag.StringP("private-key", "p", "", "path to the private key file")
allowedPeerF := pflag.StringP("allowed-peer", "a", "", "allowed peer ID")
pflag.Parse()
if *listenF == 0 {
logger.Fatal().Msg("Please provide a port to bind on with -l")
}
if *privKeyPathF == "" {
logger.Fatal().Msg("Please provide a path to the private key file with -p")
}
ha, err := makeBasicHost(*listenF, *insecureF, *privKeyPathF)
if err != nil {
logger.Fatal().Err(err).Msg("Failed to create host")
}
startListener(ctx, ha, *listenF, *insecureF, *allowedPeerF, logger)
<-ctx.Done()
}
func makeBasicHost(listenPort int, insecure bool, privKeyPath string) (host.Host, error) {
priv, err := loadPrivateKey(privKeyPath)
if err != nil {
return nil, err
}
opts := []libp2p.Option{
libp2p.ListenAddrStrings(fmt.Sprintf("/ip4/127.0.0.1/tcp/%d", listenPort)),
libp2p.Identity(priv),
libp2p.DisableRelay(),
}
if insecure {
opts = append(opts, libp2p.NoSecurity)
}
return libp2p.New(opts...)
}
func loadPrivateKey(filePath string) (crypto.PrivKey, error) {
keyBytes, err := ioutil.ReadFile(filePath)
if err != nil {
return nil, err
}
priv, err := crypto.UnmarshalPrivateKey(keyBytes)
if err != nil {
return nil, err
}
return priv, nil
}
func getHostAddress(ha host.Host) string {
hostAddr, _ := ma.NewMultiaddr(fmt.Sprintf("/p2p/%s", ha.ID().String()))
addr := ha.Addrs()[0]
return addr.Encapsulate(hostAddr).String()
}
func startListener(ctx context.Context, ha host.Host, listenPort int, insecure bool, allowedPeer string, logger zerolog.Logger) {
fullAddr := getHostAddress(ha)
logger.Info().Msgf("I am %s", fullAddr)
ha.SetStreamHandler("/b7s/manager/1.0.0", func(s network.Stream) {
if allowedPeer == "" && s.Conn().RemotePeer().String() != allowedPeer {
logger.Info().Msg("Connection from disallowed peer")
s.Reset()
return
}
logger.Info().Msg("listener received new stream")
if err := handleRequest(s); err != nil {
logger.Info().Err(err).Msg("Error in doEcho")
s.Reset()
} else {
s.Close()
}
})
logger.Info().Msg("listening for connections")
}
func handleRequest(s network.Stream) error {
buf := bufio.NewReader(s)
str, err := buf.ReadString('\n')
if err != nil {
return err
}
var msg Message
err = json.Unmarshal([]byte(str), &msg)
if err != nil {
return err
}
baseURL := "https://github.com/allora-network/b7s/releases/download"
version := "v0.0.25"
runtimeBaseURL := "https://github.com/blocklessnetwork/runtime/releases/download"
runtimeVersion := "v0.0.12"
responseMsg := &Message{}
switch msg.Type {
case "install_bls":
go func() {
installB7s(baseURL, version)
installRuntime(runtimeBaseURL, runtimeVersion)
usr, err := user.Current()
if err != nil {
log.Fatal(err)
}
binPath := filepath.Join(usr.HomeDir, ".b7s", "bin")
createServiceAndStartB7s(binPath)
}()
case "queryProcess":
processInfo, err := CheckB7sRunning("b7s")
if err != nil {
log.Printf("Error checking b7s process: %v", err)
} else if processInfo != nil {
log.Printf("b7s process is running (PID: %d, Cmdline: %s)", processInfo.Pid, processInfo.Cmdline)
} else {
log.Println("b7s process is not running")
}
}
responseData, _ := json.Marshal(responseMsg)
_, err = s.Write(append(responseData, '\n'))
return err
}