Add tack snapshot and pick snapshot

main.py

@@ -103,6 +103,14 @@ async def fastapi_execute_batch_commands(network: str, req: Request)-> ChangeSet
     cs: ChangeSet = ChangeSet()
     cs.operations = jo_root['operations']
     return execute_batch_commands(network, cs)
+
+@app.post("/tacksnapshot/")
+async def fastapi_take_snapeshot(network: str, snapshot: str)-> int:
+    return take_snapshot(network, snapshot)
+   
+@app.post("/picksnapshot/")
+async def fastapi_pick_snapeshot(network: str, snapshot: str)-> ChangeSet:
+    return pick_snapshot(network, snapshot)
     
 # node
 @app.get("/getnodes/")