Api pre order check response

Name `Lite`	Type	Required `Default`	Description
results `r`	[PreOrderCheckResult]	True	Pre order check for each new order in the request

Name `Lite`	Type	Required `Default`	Description
max_qty `mq`	[AssetMaxQty]	True	The maximum quantity for each leg
margin_required `mr`	string	True	The margin required for the order (reported in `settle_currency`)
order_valid `ov`	boolean	True	Whether the order is valid
reason `r`	string	True	The reason the order is invalid, if any
settle_currency `sc`	Currency	True	The subAccount settle currency

Name `Lite`	Type	Required `Default`	Description
asset `a`	string	True	The asset associated with the max quantity
max_buy_qty `mb`	string	True	The maximum buy quantity
max_sell_qty `ms`	string	True	The maximum sell quantity

The list of Currencies that are supported on the GRVT exchange