node, cmd/devp2p/internal/v5test: use slices.Contains

cmd/devp2p/internal/v5test/discv5tests.go

@@ -19,6 +19,7 @@ package v5test
 import (
 	"bytes"
 	"net"
+	"slices"
 	"sync"
 	"time"
 
@@ -266,7 +267,7 @@ func (s *Suite) TestFindnodeResults(t *utesting.T) {
 		n := bn.conn.localNode.Node()
 		expect[n.ID()] = n
 		d := uint(enode.LogDist(n.ID(), s.Dest.ID()))
-		if !containsUint(dists, d) {
+		if !slices.Contains(dists, d) {
 			dists = append(dists, d)
 		}
 	}

cmd/devp2p/internal/v5test/framework.go

@@ -252,12 +252,3 @@ func checkRecords(records []*enr.Record) ([]*enode.Node, error) {
 	}
 	return nodes, nil
 }
-
-func containsUint(ints []uint, x uint) bool {
-	for i := range ints {
-		if ints[i] == x {
-			return true
-		}
-	}
-	return false
-}

node/node.go

@@ -25,6 +25,7 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
+	"slices"
 	"strings"
 	"sync"
 
@@ -278,16 +279,6 @@ func (n *Node) openEndpoints() error {
 	return err
 }
 
-// containsLifecycle checks if 'lfs' contains 'l'.
-func containsLifecycle(lfs []Lifecycle, l Lifecycle) bool {
-	for _, obj := range lfs {
-		if obj == l {
-			return true
-		}
-	}
-	return false
-}
-
 // stopServices terminates running services, RPC and p2p networking.
 // It is the inverse of Start.
 func (n *Node) stopServices(running []Lifecycle) error {
@@ -571,7 +562,7 @@ func (n *Node) RegisterLifecycle(lifecycle Lifecycle) {
 	if n.state != initializingState {
 		panic("can't register lifecycle on running/stopped node")
 	}
-	if containsLifecycle(n.lifecycles, lifecycle) {
+	if slices.Contains(n.lifecycles, lifecycle) {
 		panic(fmt.Sprintf("attempt to register lifecycle %T more than once", lifecycle))
 	}
 	n.lifecycles = append(n.lifecycles, lifecycle)

node/node_test.go

@@ -23,6 +23,7 @@ import (
 	"net"
 	"net/http"
 	"reflect"
+	"slices"
 	"strings"
 	"testing"
 
@@ -116,7 +117,7 @@ func TestLifecycleRegistry_Successful(t *testing.T) {
 	noop := NewNoop()
 	stack.RegisterLifecycle(noop)
 
-	if !containsLifecycle(stack.lifecycles, noop) {
+	if !slices.Contains(stack.lifecycles, noop) {
 		t.Fatalf("lifecycle was not properly registered on the node, %v", err)
 	}
 }