first commit

bot/database/engine.py

@@ -0,0 +1,18 @@
+# sqlalchemy imports
+from sqlalchemy.engine import URL
+from sqlalchemy.ext.asyncio import AsyncEngine, AsyncSession
+from sqlalchemy.ext.asyncio import create_async_engine as _create_async_engine
+from sqlalchemy.orm import sessionmaker
+
+# another
+from typing import Union
+
+
+def create_async_engine(url: Union[URL, str]) -> AsyncEngine:
+
+    return _create_async_engine(url=url, pool_pre_ping=True, pool_recycle=3600)
+
+
+def get_session_maker(engine: AsyncEngine) -> AsyncSession:
+
+    return sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)