p2p: refactor to use time.Now().UnixMilli() in golang std lib (#32402)

Author: cuiweixie

p2p/enode/localnode.go

@@ -305,12 +305,3 @@ func (ln *LocalNode) bumpSeq() {
 	ln.seq++
 	ln.db.storeLocalSeq(ln.id, ln.seq)
 }
-
-// nowMilliseconds gives the current timestamp at millisecond precision.
-func nowMilliseconds() uint64 {
-	ns := time.Now().UnixNano()
-	if ns < 0 {
-		return 0
-	}
-	return uint64(ns / 1000 / 1000)
-}

p2p/enode/localnode_test.go

@@ -21,6 +21,7 @@ import (
 	"net"
 	"net/netip"
 	"testing"
+	"time"
 
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/p2p/enr"
@@ -53,7 +54,7 @@ func TestLocalNode(t *testing.T) {
 
 // This test checks that the sequence number is persisted between restarts.
 func TestLocalNodeSeqPersist(t *testing.T) {
-	timestamp := nowMilliseconds()
+	timestamp := uint64(time.Now().UnixMilli())
 
 	ln, db := newLocalNodeForTesting()
 	defer db.Close()

p2p/enode/nodedb.go

@@ -434,7 +434,7 @@ func (db *DB) localSeq(id ID) uint64 {
 	if seq := db.fetchUint64(localItemKey(id, dbLocalSeq)); seq > 0 {
 		return seq
 	}
-	return nowMilliseconds()
+	return uint64(time.Now().UnixMilli())
 }
 
 // storeLocalSeq stores the local record sequence counter.