ccxt: Pagination not working as expected with FTX exchange

• OS: MacOS
• Programming Language version: Python
• CCXT version: 1.50.89

I tried to get all of the trade I have made, using the method, “exchange.fetchMyTrades()”, which basically called “/fills” api as below:(start time is “2020-06-01”, and end time is “2020-06-09”)

GET https://ftx.com/api/fills?market=DOGE-PERP&limit=2&start_time=1590969600&end_time=1623236704

the expected behaviour is that it returns the earliest records first, is that right? so I could use: since = orders[len(orders) - 1][‘timestamp’] to continue to fetch more. but it continues to return the result of “2020-06-09”, and while the loop goes on it just returns same result everytime… it is really confusing, I tried the ftx api directly and the result is the same, so not sure if this has something to do with the exchange.

here is the code I am using, copied from the manual.

def getAllTrades():
  exchange = ftx
  since = exchange.milliseconds () - 86400000*3  # -1 day from now
  since = exchange.parse8601 ('2020-06-01T00:00:00Z')
  # alternatively, fetch from a certain starting datetime
  # since = exchange.parse8601('2018-01-01T00:00:00Z')
  all_orders = []
  while since < exchange.milliseconds ():
      print("since:", since)
      limit = 2  # change for your limit
      orders = exchange.fetchMyTrades(symbol, since, limit)
      if len(orders):
          since = orders[len(orders) - 1]['timestamp']
          all_orders += orders
      else:
          break

  return all_orders