[#1689] network,core/netmap: Replace Iterate*() functions with iterators

Change-Id: I4842a3160d74c56d99ea9465d4be2f0662080605
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

cmd/frostfs-node/config/node/config.go

@@ -3,7 +3,9 @@ package nodeconfig
 import (
 	"fmt"
 	"io/fs"
+	"iter"
 	"os"
+	"slices"
 	"strconv"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config"
@@ -88,12 +90,8 @@ func Wallet(c *config.Config) *keys.PrivateKey {
 
 type stringAddressGroup []string
 
-func (x stringAddressGroup) IterateAddresses(f func(string) bool) {
-	for i := range x {
-		if f(x[i]) {
-			break
-		}
-	}
+func (x stringAddressGroup) Addresses() iter.Seq[string] {
+	return slices.Values(x)
 }
 
 func (x stringAddressGroup) NumberOfAddresses() int {

pkg/core/client/util.go

@@ -3,6 +3,7 @@ package client
 import (
 	"bytes"
 	"fmt"
+	"iter"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
@@ -19,7 +20,7 @@ func nodeInfoFromKeyAddr(dst *NodeInfo, k []byte, a, external network.AddressGro
 // Args must not be nil.
 func NodeInfoFromRawNetmapElement(dst *NodeInfo, info interface {
 	PublicKey() []byte
-	IterateAddresses(func(string) bool)
+	Addresses() iter.Seq[string]
 	NumberOfAddresses() int
 	ExternalAddresses() []string
 },

pkg/core/netmap/nodes.go

@@ -1,6 +1,10 @@
 package netmap
 
-import "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
+import (
+	"iter"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
+)
 
 // Node is a named type of netmap.NodeInfo which provides interface needed
 // in the current repository. Node is expected to be used everywhere instead
@@ -14,8 +18,14 @@ func (x Node) PublicKey() []byte {
 	return (netmap.NodeInfo)(x).PublicKey()
 }
 
+// Addresses returns an iterator over all announced network addresses.
+func (x Node) Addresses() iter.Seq[string] {
+	return (netmap.NodeInfo)(x).NetworkEndpoints()
+}
+
 // IterateAddresses iterates over all announced network addresses
 // and passes them into f. Handler MUST NOT be nil.
+// Deprecated: use [Node.Addresses] instead.
 func (x Node) IterateAddresses(f func(string) bool) {
 	for s := range (netmap.NodeInfo)(x).NetworkEndpoints() {
 		if f(s) {

pkg/network/group.go

@@ -3,6 +3,7 @@ package network
 import (
 	"errors"
 	"fmt"
+	"iter"
 	"slices"
 	"sort"
 
@@ -68,9 +69,8 @@ func (x AddressGroup) Swap(i, j int) {
 
 // MultiAddressIterator is an interface of network address group.
 type MultiAddressIterator interface {
-	// IterateAddresses must iterate over network addresses and pass each one
-	// to the handler until it returns true.
-	IterateAddresses(func(string) bool)
+	// Addresses must return an iterator over network addresses.
+	Addresses() iter.Seq[string]
 
 	// NumberOfAddresses must return number of addresses in group.
 	NumberOfAddresses() int
@@ -131,19 +131,19 @@ func (x *AddressGroup) FromIterator(iter MultiAddressIterator) error {
 // iterateParsedAddresses parses each address from MultiAddressIterator and passes it to f
 // until 1st parsing failure or f's error.
 func iterateParsedAddresses(iter MultiAddressIterator, f func(s Address) error) (err error) {
-	iter.IterateAddresses(func(s string) bool {
+	for s := range iter.Addresses() {
 		var a Address
 
 		err = a.FromString(s)
 		if err != nil {
-			err = fmt.Errorf("could not parse address from string: %w", err)
-			return true
+			return fmt.Errorf("could not parse address from string: %w", err)
 		}
 
 		err = f(a)
-
-		return err != nil
-	})
+		if err != nil {
+			return err
+		}
+	}
 
 	return
 }

pkg/network/group_test.go

@@ -1,6 +1,8 @@
 package network
 
 import (
+	"iter"
+	"slices"
 	"sort"
 	"testing"
 
@@ -58,10 +60,8 @@ func TestAddressGroup_FromIterator(t *testing.T) {
 
 type testIterator []string
 
-func (t testIterator) IterateAddresses(f func(string) bool) {
-	for i := range t {
-		f(t[i])
-	}
+func (t testIterator) Addresses() iter.Seq[string] {
+	return slices.Values(t)
 }
 
 func (t testIterator) NumberOfAddresses() int {

pkg/network/validation.go

@@ -2,6 +2,7 @@ package network
 
 import (
 	"errors"
+	"iter"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 )
@@ -34,12 +35,8 @@ var (
 // MultiAddressIterator.
 type NodeEndpointsIterator netmap.NodeInfo
 
-func (x NodeEndpointsIterator) IterateAddresses(f func(string) bool) {
-	for s := range (netmap.NodeInfo)(x).NetworkEndpoints() {
-		if f(s) {
-			return
-		}
-	}
+func (x NodeEndpointsIterator) Addresses() iter.Seq[string] {
+	return (netmap.NodeInfo)(x).NetworkEndpoints()
 }
 
 func (x NodeEndpointsIterator) NumberOfAddresses() int {