func newHost()

in pkg/discovery/routing/router.go [251:280]

• 27 lines of code
• 7 McCabe index (conditional complexity)

func newHost(addr string) (host.Host, error) {
	h, p, err := net.SplitHostPort(addr)
	if err != nil {
		return nil, err
	}

	hostAddr, err := multiaddr.NewMultiaddr(fmt.Sprintf("/ip4/%s/tcp/%s", h, p))
	if err != nil {
		return nil, fmt.Errorf("could not create host multi address: %w", err)
	}

	factory := libp2p.AddrsFactory(func(addrs []multiaddr.Multiaddr) []multiaddr.Multiaddr {
		for _, addr := range addrs {
			v, err := addr.ValueForProtocol(multiaddr.P_IP4)
			if err != nil {
				continue
			}
			if v == "" {
				continue
			}
			if v == "127.0.0.1" {
				continue
			}
			return []multiaddr.Multiaddr{addr}
		}
		return nil
	})

	return libp2p.New(libp2p.ListenAddrs(hostAddr), factory)
}