(tested) fix redis to pass tests

* delete info hash count key from redis (replaced with SCARD on infohash set)
* add GC test
* add peer.Addr() functio to always return unwrapped address if 4to6 appear

frontend/http/frontend.go

@@ -297,7 +297,7 @@ func (f *Frontend) announceRoute(w http.ResponseWriter, r *http.Request, ps http
 		WriteError(w, err)
 		return
 	}
-	addr = req.AddrPort.Addr()
+	addr = req.Addr()
 
 	ctx := injectRouteParamsToContext(context.Background(), ps)
 	ctx, resp, err := f.logic.HandleAnnounce(ctx, req)

frontend/http/parser.go

@@ -178,5 +178,5 @@ func requestedIP(r *http.Request, p bittorrent.Params, opts ParseOptions) (netip
 	}
 
 	addrPort, err := netip.ParseAddrPort(r.RemoteAddr)
-	return addrPort.Addr(), false, err
+	return addrPort.Addr().Unmap(), false, err
 }

frontend/http/writer.go

@@ -98,17 +98,17 @@ func WriteScrapeResponse(w http.ResponseWriter, resp *bittorrent.ScrapeResponse)
 }
 
 func compact4(peer bittorrent.Peer) (buf []byte) {
-	ip := peer.AddrPort.Addr().As4()
+	ip := peer.Addr().As4()
 	buf = append(buf, ip[:]...)
-	port := peer.AddrPort.Port()
+	port := peer.Port()
 	buf = append(buf, byte(port>>8), byte(port&0xff))
 	return
 }
 
 func compact6(peer bittorrent.Peer) (buf []byte) {
-	ip := peer.AddrPort.Addr().As16()
+	ip := peer.Addr().As16()
 	buf = append(buf, ip[:]...)
-	port := peer.AddrPort.Port()
+	port := peer.Port()
 	buf = append(buf, byte(port>>8), byte(port&0xff))
 	return
 }