2022-01-07 9:01:03[1641546063.3376] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 25.416
    [size] => 0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)

2022-01-07 17:01:04[1641574864.0078] - new buy order: Array
(
    [contract] => DOT_USDT
    [price] => 25.864
    [size] => 0
    [tif] => gtc
)
 Array
(
    [label] => INVALID_ARGUMENT
    [detail] => invalid size
)