placeOrder took 13 positional arguments; the other five order functions took
9-13. The leading six — adapter, symbol, openOrders, locks, timers, pendings —
were the same values at all 36 call sites, and every engine spelled them out
again for each order it placed.
Introduce Parameter Object: OrderContext holds what is fixed for an engine's
lifetime (exposed once via a lazily-built this.orderContext), and each function
takes a named request. A wrong argument order is now a compile error rather than
a silently misrouted order.
The type change surfaced dead weight: placeOrder's opts.priceTick was never read
by its body, yet five engines passed it. Removed.
Also finishes the PrecisionSyncer migration — grid-engine was the ninth copy and
was missed last round, so it still carried the uncleared retry timer.
Extract Function: normalizeQuantity replaces the round-down-but-never-to-zero
block that appeared in all five order functions.
250 pass; tsc and oxlint clean.
tsconfig compiled docs/ (vendored ccxt samples) and @types/react was missing,
so 269 tsc errors buried the real ones. Scoping the project and adding the
missing type packages left 42 genuine errors in src/, which exposed two bugs:
- lighter: assertSpotBalance's buy branch and createOrder's spot-sell guard
compared the {available, wallet} object against a number, so both guards
were dead. Introduce SpotAssetBalance with a precomputed 'effective' field
(Extract Class) and route all three call sites through it.
- offset-maker: the below-min-sell branch logged 'skip sell' but pushed the
SELL order anyway, and pushed a possibly-null price. Both branches now
match their working sibling.
Also: widen LighterOrder's is_ask/reduce_only to BooleanFlag (the wire format
flags.ts already parses), extract sellableBase (Extract Function, 3 copies),
delete two scripts importing a module that does not exist, add a typecheck
script. tsc --noEmit: 269 -> 0 errors; 218 tests still pass.
discountry