fix position

src/exchanges/lighter/gateway.ts

@@ -623,9 +623,17 @@ export class LighterGateway {
   }
 
   private applyAccountAssets(assets?: LighterAccountAsset[] | Record<string, LighterAccountAsset> | null): void {
+    const payloadProvided = assets !== undefined && assets !== null;
+    const hasRawEntries =
+      Array.isArray(assets) ? assets.length > 0 : isPlainObject(assets) ? Object.keys(assets).length > 0 : false;
     const normalized = this.normalizeAssets(assets);
     if (!normalized.length) {
-      return; // ignore empty payloads to avoid wiping spot balances
+      // Explicitly clear cached balances when the venue returns an empty payload,
+      // so closed spot positions don't linger as phantom holdings.
+      if (payloadProvided && !hasRawEntries) {
+        this.assets.clear();
+      }
+      return;
     }
     for (const asset of normalized) {
       const key = this.normalizeAssetKey(asset);

src/exchanges/lighter/mappers.ts

@@ -301,11 +301,3 @@ function normalizeSymbolForms(value: string): string[] {
   if (base) forms.add(base);
   return Array.from(forms);
 }
-
-function normalizeMarketType(value: string | null | undefined): "perp" | "spot" | undefined {
-  if (!value) return undefined;
-  const normalized = value.toLowerCase();
-  if (normalized === "spot") return "spot";
-  if (normalized === "perp" || normalized === "perpetual" || normalized === "futures") return "perp";
-  return undefined;
-}