Api set sub account collateral preference request

ApiSetSubAccountCollateralPreferenceRequest

Enable or disable one or more currencies as collateral for a Multi-Asset Mode sub account.

USDT (the quote currency) cannot be disabled. Disabling collateral currencies reduces MarginBalance, and the batch is rejected when Initial Margin would no longer be covered.

Name Lite	Type	Required Default	Description
sub_account_id sa	string	True	The sub account ID to set collateral preferences for
preferences p	[ApiCollateralPreferenceItem]	True	Per-currency preferences applied atomically. Duplicate currencies and empty lists are rejected.
signature s	Signature	True	The signature of this operation

ApiCollateralPreferenceItem

A single (currency, enable) pair to toggle as collateral.

Name Lite	Type	Required Default	Description
currency c	string	True	The currency whose collateral preference is being changed
enable e	boolean	True	True to include the currency as collateral, false to exclude it

Signature

Name Lite	Type	Required Default	Description
signer s	string	True	The address (public key) of the wallet signing the payload
r r	string	True	Signature R
s s1	string	True	Signature S
v v	integer	True	Signature V
expiration e	string	True	Timestamp after which this signature expires, expressed in unix nanoseconds. Must be capped at 30 days
nonce n	integer	True	Users can randomly generate this value, used as a signature deconflicting key. ie. You can send the same exact instruction twice with different nonces. When the same nonce is used, the same payload will generate the same signature. Our system will consider the payload a duplicate, and ignore it. Range: 0 to 4,294,967,295 (uint32)
chain_id ci	string	True	Chain ID used in EIP-712 domain. Zero value fallbacks to GRVT Chain ID.