[#33] network: Add network endpoint getter to Address

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/network/address.go

@@ -2,6 +2,8 @@ package network
 
 import (
 	"github.com/multiformats/go-multiaddr"
+	manet "github.com/multiformats/go-multiaddr-net"
+	"github.com/pkg/errors"
 )
 
 // Address represents the NeoFS node
@@ -14,6 +16,16 @@ func (a Address) String() string {
 	return a.ma.String()
 }
 
+// NetAddr returns network endpoint address in string format.
+func (a Address) NetAddr() string {
+	ip, err := manet.ToNetAddr(a.ma)
+	if err != nil {
+		panic(errors.Wrap(err, "could not get net addr"))
+	}
+
+	return ip.String()
+}
+
 // AddressFromString restores address from a string representation.
 func AddressFromString(s string) (*Address, error) {
 	ma, err := multiaddr.NewMultiaddr(s)

pkg/network/address_test.go

@@ -0,0 +1,28 @@
+package network
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/multiformats/go-multiaddr"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAddress_NetAddr(t *testing.T) {
+	ip := "127.0.0.1"
+	port := "8080"
+
+	ma, err := multiaddr.NewMultiaddr(strings.Join([]string{
+		"/ip4",
+		ip,
+		"tcp",
+		port,
+	}, "/"))
+
+	require.NoError(t, err)
+
+	addr, err := AddressFromString(ma.String())
+	require.NoError(t, err)
+
+	require.Equal(t, ip+":"+port, addr.NetAddr())
+}