autonatv2: remove dependency on webrtc and webtransport

Author: sukunrt

p2p/protocol/autonatv2/client.go

@@ -14,8 +14,6 @@ import (
 	"github.com/libp2p/go-libp2p/core/network"
 	"github.com/libp2p/go-libp2p/core/peer"
 	"github.com/libp2p/go-libp2p/p2p/protocol/autonatv2/pb"
-	libp2pwebrtc "github.com/libp2p/go-libp2p/p2p/transport/webrtc"
-	libp2pwebtransport "github.com/libp2p/go-libp2p/p2p/transport/webtransport"
 	"github.com/libp2p/go-msgio/pbio"
 	ma "github.com/multiformats/go-multiaddr"
 )
@@ -328,20 +326,20 @@ func (ac *client) handleDialBack(s network.Stream) {
 }
 
 // normalizeMultiaddr returns a multiaddr suitable for equality checks.
-// If the multiaddr is a webtransport component, it removes the certhashes.
+// it removes trailing certhashes.
 func normalizeMultiaddr(addr ma.Multiaddr) ma.Multiaddr {
-	ok, n := libp2pwebtransport.IsWebtransportMultiaddr(addr)
-	if !ok {
-		ok, n = libp2pwebrtc.IsWebRTCDirectMultiaddr(addr)
-	}
-	if ok && n > 0 {
-		out := addr
-		for i := 0; i < n; i++ {
-			out, _ = ma.SplitLast(out)
+	addr = removeTrailing(addr, ma.P_P2P)
+	addr = removeTrailing(addr, ma.P_CERTHASH)
+	return addr
+}
+
+func removeTrailing(addr ma.Multiaddr, protocolCode int) ma.Multiaddr {
+	for i := len(addr) - 1; i >= 0; i-- {
+		if addr[i].Code() != protocolCode {
+			return addr[0 : i+1]
 		}
-		return out
 	}
-	return addr
+	return nil
 }
 
 func (ac *client) areAddrsConsistent(connLocalAddr, dialedAddr ma.Multiaddr) bool {