Add restore method

main.py

@@ -154,6 +154,10 @@ async def fastapi_pick_snapeshot(network: str, snapshot: str)-> ChangeSet:
 @app.post("/pickoperation/")
 async def fastapi_pick_operation(network: str, operation: int) -> ChangeSet:
     return pick_operation(network, operation)
+
+@app.get("/getrestoreopeation/")
+async def fastapi_get_restore_operation(network : str) -> int:
+    return get_restore_operation(network)
     
 # node
 @app.get("/getnodes/")