OptionalconstraintsOptionaldefaultDefault product when a request doesn't specify one.
OptionaldisableTurn off the feed-level duplicate guard. Default false, i.e. the guard is
on. Only set true if a layer above already owns idempotency AND you have
read why that is usually the wrong call: see _claimToken.
OptionalfetchOptionalinit: RequestInitOptionalmodeHow long a server-mode reading stays usable, in ms. Default 5000.
OptionalnowClock, injectable so the mode cache is testable without real timers.
OptionalonCalled after an order book fetch that had to quarantine rows. Fail-closed parsing drops nothing silently: a host that shows the book must be able to tell the trader that part of it could not be read.
OptionalstrategyStrategy label sent with orders (OpenAlgo groups by strategy).
OptionalverifyMode guard on place. Default 'auto', which is described in full on
_assertMode. 'always' checks both directions and refuses when the
server cannot be asked; 'off' restores the pre-1.6 behaviour of trusting
the caller's mode outright.
Instrument constraints for the advisory pre-trade check on
place, looked up per order. Return undefined when the instrument is unknown; the universal checks below still apply.Optional because most of the value needs no configuration: a quantity that is NaN, negative or fractional is wrong for every Indian instrument and is rejected without knowing anything about the symbol. Supply this to add the freeze limit and the lot grid, which do need instrument data.