add a WithDefaultStaticRelays AutoRelay option

options.go

@@ -271,11 +271,7 @@ func StaticRelays(relays []peer.AddrInfo) Option {
 func DefaultStaticRelays() Option {
 	return func(cfg *Config) error {
 		for _, addr := range autorelay.DefaultRelays {
-			a, err := ma.NewMultiaddr(addr)
-			if err != nil {
-				return err
-			}
-			pi, err := peer.AddrInfoFromP2pAddr(a)
+			pi, err := peer.AddrInfoFromString(addr)
 			if err != nil {
 				return err
 			}

p2p/host/autorelay/autorelay.go

@@ -53,6 +53,18 @@ var DefaultRelays = []string{
 	"/ip4/147.75.70.221/udp/4001/quic/p2p/Qme8g49gm3q4Acp7xWBKg3nAa9fxZ1YmyDJdyGgoG6LsXh",
 }
 
+var defaultStaticRelays []peer.AddrInfo
+
+func init() {
+	for _, s := range DefaultRelays {
+		pi, err := peer.AddrInfoFromString(s)
+		if err != nil {
+			panic(fmt.Sprintf("failed to initialize default static relays: %s", err))
+		}
+		defaultStaticRelays = append(defaultStaticRelays, *pi)
+	}
+}
+
 type Option func(*AutoRelay) error
 
 func WithStaticRelays(static []peer.AddrInfo) Option {
@@ -65,6 +77,10 @@ func WithStaticRelays(static []peer.AddrInfo) Option {
 	}
 }
 
+func WithDefaultStaticRelays() Option {
+	return WithStaticRelays(defaultStaticRelays)
+}
+
 func WithDiscoverer(discover discovery.Discoverer) Option {
 	return func(r *AutoRelay) error {
 		r.discover = discover