diff --git a/client_manager.py b/client_manager.py
index 45c63fe..a717a48 100644
--- a/client_manager.py
+++ b/client_manager.py
@@ -4,7 +4,7 @@ from typing import Any, Callable, List
 from fastapi import WebSocket
 from loguru import logger
 
-from .crud import create_event, mark_events_deleted, get_event, get_events
+from .crud import create_event, get_event, get_events, mark_events_deleted
 from .models import NostrEvent, NostrEventType, NostrFilter
 
 
diff --git a/crud.py b/crud.py
index 6139fd9..2711aac 100644
--- a/crud.py
+++ b/crud.py
@@ -54,11 +54,11 @@ async def get_event(relay_id: str, id: str) -> Optional[NostrEvent]:
     return event
 
 async def mark_events_deleted(relay_id: str,  filter: NostrFilter):
-    if len(filter.ids) == 0:
+    if filter.is_empty():
         return None
-    ids = ",".join(["?"] * len(filter.ids))
-    values = [relay_id] + filter.ids
-    await db.execute(f"UPDATE nostrrelay.events SET deleted=true WHERE relay_id = ? AND id IN ({ids})", tuple(values))
+    _, where, values = build_where_clause(relay_id, filter)
+
+    await db.execute(f"""UPDATE nostrrelay.events SET deleted=true WHERE {" AND ".join(where)}""", tuple(values))
 
 
 async def create_event_tags(
@@ -109,6 +109,7 @@ def build_select_events_query(relay_id:str, filter:NostrFilter):
         ORDER BY created_at DESC
         """
 
+    # todo: check range
     if filter.limit and filter.limit > 0:
         query += f" LIMIT {filter.limit}"
 
diff --git a/models.py b/models.py
index b064d6d..9c16c03 100644
--- a/models.py
+++ b/models.py
@@ -20,14 +20,15 @@ class NostrRelay(BaseModel):
     def from_row(cls, row: Row) -> "NostrRelay":
         return cls(**dict(row))
 
+
 class NostrRelayInfo(BaseModel):
-  name: Optional[str] 
-  description: Optional[str] 
-  pubkey: Optional[str] 
-  contact: Optional[str] = "https://t.me/lnbits"
-  supported_nips: List[str] = ["NIP01", "NIP09", "NIP11", "NIP15", "NIP20"]
-  software: Optional[str] = "LNbist"
-  version: Optional[str]
+    name: Optional[str]
+    description: Optional[str]
+    pubkey: Optional[str]
+    contact: Optional[str] = "https://t.me/lnbits"
+    supported_nips: List[str] = ["NIP01", "NIP09", "NIP11", "NIP15", "NIP20"]
+    software: Optional[str] = "LNbist"
+    version: Optional[str]
 
 
 class NostrEventType(str, Enum):
@@ -80,7 +81,6 @@ class NostrEvent(BaseModel):
         if not valid_signature:
             raise ValueError(f"Invalid signature: '{self.sig}' for event '{self.id}'")
 
-
     def serialize_response(self, subscription_id):
         return [NostrEventType.EVENT, subscription_id, dict(self)]
 
@@ -128,8 +128,21 @@ class NostrFilter(BaseModel):
             return True
 
         event_tag_values = [t[1] for t in event_tags if t[0] == tag_name]
-        
-        common_tags = [event_tag for event_tag in event_tag_values if event_tag in filter_tags]
+
+        common_tags = [
+            event_tag for event_tag in event_tag_values if event_tag in filter_tags
+        ]
         if len(common_tags) == 0:
             return False
         return True
+
+    def is_empty(self):
+        return (
+            len(self.ids) == 0
+            and len(self.authors) == 0
+            and len(self.kinds) == 0
+            and len(self.e) == 0
+            and len(self.p) == 0
+            and (not self.since)
+            and (not self.until)
+        )