2021-12-02 4:01:02[1638417662.3638] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 35.1812
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)

2021-12-02 9:01:02[1638435662.8601] - new sell order: Array
(
    [contract] => DOT_USDT
    [price] => 35.996
    [size] => -0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)