diff --git a/eventstore/bleve/lib.go b/eventstore/bleve/lib.go
index 6ae0c81..10138c9 100644
--- a/eventstore/bleve/lib.go
+++ b/eventstore/bleve/lib.go
@@ -56,6 +56,11 @@ func (b *BleveBackend) Init() error {
 	return nil
 }
 
-func (b *BleveBackend) CountEvents(nostr.Filter) (uint32, error) {
+func (b *BleveBackend) CountEvents(filter nostr.Filter) (uint32, error) {
+	if filter.String() == "{}" {
+		count, err := b.index.DocCount()
+		return uint32(count), err
+	}
+
 	return 0, errors.New("not supported")
 }
diff --git a/eventstore/bleve/replace.go b/eventstore/bleve/replace.go
index 0d9e5e2..21163b7 100644
--- a/eventstore/bleve/replace.go
+++ b/eventstore/bleve/replace.go
@@ -5,7 +5,6 @@ import (
 
 	"fiatjaf.com/nostr"
 	"fiatjaf.com/nostr/eventstore"
-	"fiatjaf.com/nostr/eventstore/internal"
 )
 
 func (b *BleveBackend) ReplaceEvent(evt nostr.Event) error {
@@ -19,7 +18,7 @@ func (b *BleveBackend) ReplaceEvent(evt nostr.Event) error {
 
 	shouldStore := true
 	for previous := range b.QueryEvents(filter, 1) {
-		if internal.IsOlder(previous, evt) {
+		if nostr.IsOlder(previous, evt) {
 			if err := b.DeleteEvent(previous.ID); err != nil {
 				return fmt.Errorf("failed to delete event for replacing: %w", err)
 			}
diff --git a/eventstore/boltdb/replace.go b/eventstore/boltdb/replace.go
index 2f3588b..fd3b924 100644
--- a/eventstore/boltdb/replace.go
+++ b/eventstore/boltdb/replace.go
@@ -5,7 +5,6 @@ import (
 	"iter"
 
 	"fiatjaf.com/nostr"
-	"fiatjaf.com/nostr/eventstore/internal"
 	"go.etcd.io/bbolt"
 )
 
@@ -36,7 +35,7 @@ func (b *BoltBackend) ReplaceEvent(evt nostr.Event) error {
 
 		shouldStore := true
 		for previous := range results {
-			if internal.IsOlder(previous, evt) {
+			if nostr.IsOlder(previous, evt) {
 				if err := b.delete(txn, previous.ID); err != nil {
 					return fmt.Errorf("failed to delete event %s for replacing: %w", previous.ID, err)
 				}
diff --git a/eventstore/internal/helpers.go b/eventstore/internal/helpers.go
index 6e5b2aa..ebc9acb 100644
--- a/eventstore/internal/helpers.go
+++ b/eventstore/internal/helpers.go
@@ -1,17 +1,11 @@
 package internal
 
 import (
-	"bytes"
 	"math"
 
 	"fiatjaf.com/nostr"
 )
 
-func IsOlder(previous, next nostr.Event) bool {
-	return previous.CreatedAt < next.CreatedAt ||
-		(previous.CreatedAt == next.CreatedAt && bytes.Compare(previous.ID[:], next.ID[:]) == 1)
-}
-
 func ChooseNarrowestTag(filter nostr.Filter) (key string, values []string, goodness int) {
 	var tagKey string
 	var tagValues []string
diff --git a/eventstore/lmdb/replace.go b/eventstore/lmdb/replace.go
index 4931540..d47ac94 100644
--- a/eventstore/lmdb/replace.go
+++ b/eventstore/lmdb/replace.go
@@ -5,7 +5,6 @@ import (
 	"iter"
 
 	"fiatjaf.com/nostr"
-	"fiatjaf.com/nostr/eventstore/internal"
 	"github.com/PowerDNS/lmdb-go/lmdb"
 )
 
@@ -37,7 +36,7 @@ func (b *LMDBBackend) ReplaceEvent(evt nostr.Event) error {
 
 		shouldStore := true
 		for previous := range results {
-			if internal.IsOlder(previous, evt) {
+			if nostr.IsOlder(previous, evt) {
 				if err := b.delete(txn, previous.ID); err != nil {
 					return fmt.Errorf("failed to delete event %s for replacing: %w", previous.ID, err)
 				}
diff --git a/eventstore/mmm/replace.go b/eventstore/mmm/replace.go
index 57657b3..8e11ea5 100644
--- a/eventstore/mmm/replace.go
+++ b/eventstore/mmm/replace.go
@@ -6,7 +6,6 @@ import (
 	"runtime"
 
 	"fiatjaf.com/nostr"
-	"fiatjaf.com/nostr/eventstore/internal"
 	"github.com/PowerDNS/lmdb-go/lmdb"
 )
 
@@ -72,7 +71,7 @@ func (il *IndexingLayer) ReplaceEvent(evt nostr.Event) error {
 	var acquiredFreeRangeFromDelete *position
 	shouldStore := true
 	for previous := range results {
-		if internal.IsOlder(previous, evt) {
+		if nostr.IsOlder(previous, evt) {
 			if pos, shouldPurge, err := il.delete(mmmtxn, iltxn, previous.ID); err != nil {
 				return fmt.Errorf("failed to delete event %s for replacing: %w", previous.ID, err)
 			} else if shouldPurge {
diff --git a/eventstore/slicestore/lib.go b/eventstore/slicestore/lib.go
index f25c62d..fd5ff8c 100644
--- a/eventstore/slicestore/lib.go
+++ b/eventstore/slicestore/lib.go
@@ -10,7 +10,6 @@ import (
 
 	"fiatjaf.com/nostr"
 	"fiatjaf.com/nostr/eventstore"
-	"fiatjaf.com/nostr/eventstore/internal"
 )
 
 var _ eventstore.Store = (*SliceStore)(nil)
@@ -134,7 +133,7 @@ func (b *SliceStore) ReplaceEvent(evt nostr.Event) error {
 
 	shouldStore := true
 	for previous := range b.QueryEvents(filter, 1) {
-		if internal.IsOlder(previous, evt) {
+		if nostr.IsOlder(previous, evt) {
 			if err := b.delete(previous.ID); err != nil {
 				return fmt.Errorf("failed to delete event for replacing: %w", err)
 			}
diff --git a/khatru/helpers.go b/khatru/helpers.go
index 2229160..b2c1405 100644
--- a/khatru/helpers.go
+++ b/khatru/helpers.go
@@ -1,19 +1,11 @@
 package khatru
 
 import (
-	"bytes"
 	"net"
 	"net/http"
 	"strings"
-
-	"fiatjaf.com/nostr"
 )
 
-func isOlder(previous, next *nostr.Event) bool {
-	return previous.CreatedAt < next.CreatedAt ||
-		(previous.CreatedAt == next.CreatedAt && bytes.Compare(previous.ID[:], next.ID[:]) == 1)
-}
-
 var privateMasks = func() []net.IPNet {
 	privateCIDRs := []string{
 		"127.0.0.0/8",
diff --git a/utils.go b/utils.go
index e8bea0a..0766515 100644
--- a/utils.go
+++ b/utils.go
@@ -82,3 +82,8 @@ func AppendUnique[I comparable](arr []I, item ...I) []I {
 	}
 	return arr
 }
+
+func IsOlder(previous, next Event) bool {
+	return previous.CreatedAt < next.CreatedAt ||
+		(previous.CreatedAt == next.CreatedAt && bytes.Compare(previous.ID[:], next.ID[:]) == 1)
+}