begin and end parameters missed.
# Get Transaction Details History
def get_fills_history(self, instType, uly='', instId='', ordId='', after='', before='', limit='', instFamily=''):
params = {'instType': instType, 'uly': uly, 'instId': instId, 'ordId': ordId, 'after': after, 'before': before,
'limit': limit, 'instFamily': instFamily}
return self._request_with_params(GET, ORDERS_FILLS_HISTORY, params)
https://www.okx.com/docs-v5/en/?python#order-book-trading-trade-get-transaction-details-last-1-year
begin and end parameters missed.