Support Post-Only orders, If you only want to fill orders as a maker, you can set the
post_only paramter to true when you create them. But
immediate_or_cancel can't be true at the same time.
After this upgrade, we will return the orders except none filled orders by default when you request the closed order list. If you want to query the NONE_FILLED orders, set the
state params to
The inserted time and updated time of orders and trades have already accurate to milliseconds. In some sorting scenarios, the inserted time is more accurate than id.