pub fn action_to_call(
action: &Action,
market: &Market,
trade_account_id: &str,
accounts_registry_id: Option<&[u8; 32]>,
) -> Result<(CallArg, Value), O2Error>Expand description
Convert a high-level Action to a low-level CallArg and JSON representation.
This is the typed counterpart to building calls manually. It handles
price/quantity scaling internally using the Market.