make async db calls

xmrnodes/app.py

@@ -314,7 +314,7 @@ def validate():
 @app.cli.command("export")
 def export():
     all_nodes = []
-    ts = int(arrow.get().timestamp())
+    ts = int(arrow.get().timestamp)
     export_dir = f"{config.DATA_DIR}/export.txt"
     export_dir_stamped = f"{config.DATA_DIR}/export-{ts}.txt"
     nodes = Node.select().where(Node.validated == True)

xmrnodes/models.py

@@ -2,11 +2,12 @@ from urllib.parse import urlparse
 from datetime import datetime
 
 from peewee import *
+from playhouse.sqliteq import SqliteQueueDatabase
 
 from xmrnodes import config
 
 
-db = SqliteDatabase(f"{config.DATA_DIR}/sqlite.db")
+db = SqliteQueueDatabase(f"{config.DATA_DIR}/sqlite.db")
 
 class Node(Model):
     id = AutoField()