Indexer Quality Score TrustLess

daemons/node/common/utils.go

@@ -0,0 +1,40 @@
+package common
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/libp2p/go-libp2p/core/host"
+	pp "github.com/libp2p/go-libp2p/core/peer"
+	"github.com/multiformats/go-multiaddr"
+)
+
+func PeerIsAlive(h host.Host, ad pp.AddrInfo) bool {
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+
+	err := h.Connect(ctx, ad)
+	return err == nil
+}
+
+func ExtractIP(addr string) (net.IP, error) {
+	ma, err := multiaddr.NewMultiaddr(addr)
+	if err != nil {
+		return nil, err
+	}
+	ips, err := ma.ValueForProtocol(multiaddr.P_IP4) // or P_IP6
+	if err != nil {
+		return nil, err
+	}
+	host, _, err := net.SplitHostPort(ips)
+	if err != nil {
+		return nil, err
+	}
+	ip := net.ParseIP(host)
+	if ip == nil {
+		return nil, fmt.Errorf("invalid IP: %s", host)
+	}
+	return ip, nil
+}