长安链源码分析启动（3）

func (server *ChainMakerServer) initNet() error {	//定义网络类型  var netType protocol.NetType	var err error	// 加载网络配置	provider := localconf.ChainMakerConfig.NetConfig.Provider	log.Infof("load net provider: %s", provider)  //查看网络配置类型，有两种，分别是libp2p和liquid	switch strings.ToLower(provider) {	case "libp2p":		netType = protocol.Libp2p
	case "liquid":		netType = protocol.Liquid	default:		return errors.New("unsupported net provider")	}  //读取安全认证类型	authType := localconf.ChainMakerConfig.AuthType	emptyAuthType := ""
  //读取tls连接配置的私钥路径	keyPath := localconf.ChainMakerConfig.NetConfig.TLSConfig.PrivKeyFile	if !filepath.IsAbs(keyPath) {		keyPath, err = filepath.Abs(keyPath)		if err != nil {			return err		}	}	log.Infof("load net tls key file path: %s", keyPath)
	var certPath string	var pubKeyMode bool  //安全认证类型有5种，分别是PermissionedWithKey、Public、PermissionedWithCert  //Identity、emptyAuthType	switch strings.ToLower(authType) {	case protocol.PermissionedWithKey, protocol.Public:		pubKeyMode = true	case protocol.PermissionedWithCert, protocol.Identity, emptyAuthType:		pubKeyMode = false		certPath = localconf.ChainMakerConfig.NetConfig.TLSConfig.CertFile		if !filepath.IsAbs(certPath) {			certPath, err = filepath.Abs(certPath)			if err != nil {				return err			}		}		log.Infof("load net tls cert file path: %s", certPath)	default:		return errors.New("wrong auth type")	}	//通过网络工厂类创建一个网络，  //传入参数主要是网络类型，监听地址、加密信息等等，细节暂时不研究	var netFactory net.NetFactory	server.net, err = netFactory.NewNet(		netType,		net.WithReadySignalC(server.readyC),		net.WithListenAddr(localconf.ChainMakerConfig.NetConfig.ListenAddr),		net.WithCrypto(pubKeyMode, keyPath, certPath),		net.WithPeerStreamPoolSize(localconf.ChainMakerConfig.NetConfig.PeerStreamPoolSize),		net.WithMaxPeerCountAllowed(localconf.ChainMakerConfig.NetConfig.MaxPeerCountAllow),		net.WithPeerEliminationStrategy(localconf.ChainMakerConfig.NetConfig.PeerEliminationStrategy),		net.WithSeeds(localconf.ChainMakerConfig.NetConfig.Seeds...),		net.WithBlackAddresses(localconf.ChainMakerConfig.NetConfig.BlackList.Addresses...),		net.WithBlackNodeIds(localconf.ChainMakerConfig.NetConfig.BlackList.NodeIds...),		net.WithMsgCompression(localconf.ChainMakerConfig.DebugConfig.UseNetMsgCompression),		net.WithInsecurity(localconf.ChainMakerConfig.DebugConfig.IsNetInsecurity),	)	if err != nil {		errMsg := fmt.Sprintf("new net failed, %s", err.Error())		log.Error(errMsg)		return errors.New(errMsg)	}
	// 读取私钥文件	file, err := ioutil.ReadFile(keyPath)	if err != nil {		return err	}  //从私钥文件中读取私钥	privateKey, err := asym.PrivateKeyFromPEM(file, nil)	if err != nil {		return err	}  //基于私钥创建一个nodeid	nodeId, err := helper.CreateLibp2pPeerIdWithPrivateKey(privateKey)	if err != nil {		return err	}  //设置nodeid	localconf.ChainMakerConfig.SetNodeId(nodeId)
	// 加载TrustRoots文件，并设置到网络中	for _, chainTrustRoots := range localconf.ChainMakerConfig.NetConfig.CustomChainTrustRoots {		roots := make([][]byte, 0, len(chainTrustRoots.TrustRoots))		for _, r := range chainTrustRoots.TrustRoots {			rootBytes, err2 := ioutil.ReadFile(r.Root)			if err2 != nil {				log.Errorf("load custom chain trust roots failed, %s", err2.Error())				return err2			}			roots = append(roots, rootBytes)		}		server.net.SetChainCustomTrustRoots(chainTrustRoots.ChainId, roots)		log.Infof("set custom trust roots for chain[%s] success.", chainTrustRoots.ChainId)	}	return nil}