diff --git a/src/client.py b/src/client.py
index 303f19d..59a91cd 100644
--- a/src/client.py
+++ b/src/client.py
@@ -213,7 +213,7 @@ class IP_Message(BaseModel):
     dest_ip: str
     message_name: str
     source_ip: str
-    pk: int
+    pk: Tuple[int, int]
 
 
 class Request_Message(BaseModel):
@@ -305,7 +305,7 @@ async def recieve_request(i_m: IP_Message):
     message = b"hello world" + random.randbytes(8)
     
     # send message to nodes
-    await send_messages(node_ips, message, dest_ip, pk_B, threshold)  # type: ignore
+    await send_messages(tuple(node_ips), message, dest_ip, pk_B, threshold)  
     response = {"threshold": threshold, "public_key": own_public_key}
     return response
 
diff --git a/src/server.py b/src/server.py
index c4b8fa3..18d6214 100644
--- a/src/server.py
+++ b/src/server.py
@@ -29,6 +29,7 @@ def init():
     asyncio.create_task(receive_heartbeat_internal())
 
 def clean_env():
+    clear_database()
     # 关闭游标和连接
     cursor.close()
     conn.close()
@@ -86,14 +87,14 @@ async def delete_node(ip: str) -> None:
         print(f"Node with IP {ip} not found.")
 
 # 接收节点心跳包
-@app.post("/server/heartbeat")
+@app.get("/server/heartbeat")
 async def receive_heartbeat(ip: str):
         cursor.execute("UPDATE nodes SET last_heartbeat = ? WHERE ip = ?", (time.time(), ip))
         return {"status": "received"}     
     
 async def receive_heartbeat_internal():
     while 1:
-        timeout = 70
+        timeout = 7
         # 删除超时的节点
         # cursor.execute("DELETE FROM nodes WHERE last_heartbeat < ?", (time.time() - timeout,))
         # conn.commit()
@@ -120,12 +121,12 @@ async def send_nodes_list(count: int) -> list:
 
     return nodes_list
 
-@app.get("/server/clear_database")
-async def clear_database() -> None:
+# @app.get("/server/clear_database")
+def clear_database() -> None:
     cursor.execute("DELETE FROM nodes")
     conn.commit()
 
 if __name__ == "__main__":
     import uvicorn  # pylint: disable=e0401
 
-    uvicorn.run("server:app", host="0.0.0.0", port=8000, reload=True)
\ No newline at end of file
+    uvicorn.run("server:app", host="0.0.0.0", port=8000, reload=True)