2021-10-15 5:01:02[1634274062.569] - new buy order: Array ( [contract] => DOT_USDT [price] => 40.5327 [size] => 14 [tif] => gtc ) Array ( [id] => 78015284285 [contract] => DOT_USDT [mkfr] => 0 [tkfr] => 0.0005 [tif] => gtc [is_reduce_only] => [create_time] => 1634274062.434 [price] => 40.5327 [size] => 14 [refr] => 0 [left] => 14 [text] => api [fill_price] => 0 [user] => 621225 [status] => open [is_liq] => [refu] => 0 [is_close] => [iceberg] => 0 ) 2021-10-15 8:01:03[1634284863.3536] - new buy order: Array ( [contract] => DOT_USDT [price] => 40.8617 [size] => 38 [tif] => gtc ) Array ( [id] => 78078170750 [contract] => DOT_USDT [mkfr] => 0 [tkfr] => 0.0005 [tif] => gtc [is_reduce_only] => [create_time] => 1634284863.242 [price] => 40.8617 [size] => 38 [refr] => 0 [left] => 38 [text] => api [fill_price] => 0 [user] => 621225 [status] => open [is_liq] => [refu] => 0 [is_close] => [iceberg] => 0 ) 2021-10-15 17:01:03[1634317263.7615] - new buy order: Array ( [contract] => DOT_USDT [price] => 40.5574 [size] => 0 [tif] => gtc ) Array ( [label] => INVALID_ARGUMENT [detail] => invalid size )