Note

Medium Risk
Touches Perps order/position management and provider networking behavior (cache-vs-REST fallbacks), which can affect trade execution flows and data freshness. Changes are mitigated by added validation, staleness checks, and expanded unit tests, but still warrant careful review in production-like conditions.

Overview
Reduces Perps 429s by shifting several read paths to cache-first WebSocket data with REST fallback: adds getOrFetchFills (provider + aggregated provider) and introduces atomic cache getters for orders/fills/prices in HyperLiquidSubscriptionService.

Updates HyperLiquidProvider to centralize price retrieval (getOrFetchPrice with validity checks), prefer live WebSocket positions for updatePositionTPSL/closePosition, and avoid multi-DEX REST queries when canceling TP/SL orders (use cached orders or single-DEX fallback).

Refactors stop-loss prompt handling: useHasExistingPosition now returns positionOpenedTimestamp (WS fills + REST fallback) and PerpsMarketDetailsView adds staleness/closure-safety refs so banner TP/SL updates don’t misapply after market/position changes; the banner UI switches from a toggle to a Set button with success checkmark + delayed fade-out. Also improves order flow UX by surfacing a toast when post-order TP/SL updates fail.

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