feat: enhance order handling in LighterGateway and introduce order identity normalization for improved precision and consistency

tests/lighter/orders.test.ts

@@ -0,0 +1,36 @@
+import { describe, expect, it } from "vitest";
+import { lighterOrderToAster } from "../../src/exchanges/lighter/mappers";
+import type { LighterOrder } from "../../src/exchanges/lighter/types";
+
+function createOrder(overrides: Partial<LighterOrder> = {}): LighterOrder {
+  return {
+    order_index: 1,
+    client_order_index: 1,
+    market_index: 99,
+    initial_base_amount: "0.1",
+    remaining_base_amount: "0.1",
+    price: "154.86",
+    type: "limit",
+    reduce_only: "No",
+    side: "buy",
+    ...overrides,
+  } as LighterOrder;
+}
+
+describe("lighterOrderToAster", () => {
+  it("treats textual reduce_only flags correctly", () => {
+    const nonReduce = lighterOrderToAster("USDJPY", createOrder({ reduce_only: "No" }));
+    expect(nonReduce.reduceOnly).toBe(false);
+
+    const reduce = lighterOrderToAster("USDJPY", createOrder({ reduce_only: "Yes" }));
+    expect(reduce.reduceOnly).toBe(true);
+  });
+
+  it("uses numeric is_ask flag for side inference", () => {
+    const sell = lighterOrderToAster("USDJPY", createOrder({ is_ask: 1 }));
+    expect(sell.side).toBe("SELL");
+
+    const buy = lighterOrderToAster("USDJPY", createOrder({ is_ask: 0 }));
+    expect(buy.side).toBe("BUY");
+  });
+});