fix: correct Lighter API response parsing for GetOpenOrders

- Changed response field from 'data' to 'orders' to match Lighter API
- Updated OrderResponse struct to match Lighter's actual field names
- Fixed field types: price/quantity as strings, is_ask for side

trader/lighter_trader_v2_orders.go

@@ -148,7 +148,7 @@ func (t *LighterTraderV2) GetOrderStatus(symbol string, orderID string) (map[str
 		"orderId":     order.OrderID,
 		"status":      unifiedStatus,
 		"avgPrice":    order.Price,
-		"executedQty": order.FilledQty,
+		"executedQty": order.FilledBaseAmount,
 		"commission":  0.0,
 	}, nil
 }
@@ -239,11 +239,11 @@ func (t *LighterTraderV2) GetActiveOrders(symbol string) ([]OrderResponse, error
 
 	logger.Infof("📋 LIGHTER GetActiveOrders raw response: %s", string(body))
 
-	// Parse response
+	// Parse response - Lighter API uses "orders" field, not "data"
 	var apiResp struct {
 		Code    int              `json:"code"`
 		Message string           `json:"message"`
-		Data    []OrderResponse  `json:"data"`
+		Orders  []OrderResponse  `json:"orders"`
 	}
 
 	if err := json.Unmarshal(body, &apiResp); err != nil {
@@ -254,8 +254,8 @@ func (t *LighterTraderV2) GetActiveOrders(symbol string) ([]OrderResponse, error
 		return nil, fmt.Errorf("failed to get active orders (code %d): %s", apiResp.Code, apiResp.Message)
 	}
 
-	logger.Infof("✓ LIGHTER - Retrieved %d active orders", len(apiResp.Data))
-	return apiResp.Data, nil
+	logger.Infof("✓ LIGHTER - Retrieved %d active orders", len(apiResp.Orders))
+	return apiResp.Orders, nil
 }
 
 // CancelOrder Cancel a single order

trader/lighter_trader_v2_trading.go

@@ -697,19 +697,19 @@ func (t *LighterTraderV2) GetOpenOrders(symbol string) ([]OpenOrder, error) {
 
 	var result []OpenOrder
 	for _, order := range activeOrders {
-		// Convert side: Lighter uses "bid"/"ask", we need "BUY"/"SELL"
+		// Convert side: Lighter uses is_ask (true=sell, false=buy)
 		side := "BUY"
-		if order.Side == "ask" || order.Side == "SELL" || order.Side == "sell" {
+		if order.IsAsk {
 			side = "SELL"
 		}
 
-		// Determine order type
+		// Determine order type from Lighter's type field
 		orderType := "LIMIT"
-		if order.OrderType == "market" {
+		if order.Type == "market" {
 			orderType = "MARKET"
-		} else if order.OrderType == "stop_loss" {
+		} else if order.Type == "stop_loss" || order.Type == "stop" {
 			orderType = "STOP_MARKET"
-		} else if order.OrderType == "take_profit" {
+		} else if order.Type == "take_profit" {
 			orderType = "TAKE_PROFIT_MARKET"
 		}
 
@@ -719,15 +719,23 @@ func (t *LighterTraderV2) GetOpenOrders(symbol string) ([]OpenOrder, error) {
 			positionSide = "SHORT"
 		}
 
+		// Parse price and quantity from string fields
+		price, _ := strconv.ParseFloat(order.Price, 64)
+		quantity, _ := strconv.ParseFloat(order.RemainingBaseAmount, 64)
+		if quantity == 0 {
+			quantity, _ = strconv.ParseFloat(order.InitialBaseAmount, 64)
+		}
+		triggerPrice, _ := strconv.ParseFloat(order.TriggerPrice, 64)
+
 		openOrder := OpenOrder{
 			OrderID:      order.OrderID,
 			Symbol:       symbol,
 			Side:         side,
 			PositionSide: positionSide,
 			Type:         orderType,
-			Price:        order.Price,
-			StopPrice:    order.Price, // For stop orders, price is the trigger price
-			Quantity:     order.Quantity,
+			Price:        price,
+			StopPrice:    triggerPrice,
+			Quantity:     quantity,
 			Status:       "NEW",
 		}
 		result = append(result, openOrder)

trader/lighter_types.go

@@ -41,18 +41,24 @@ type CreateOrderRequest struct {
 	PostOnly    bool    `json:"post_only"`     // Post-only (maker only)
 }
 
-// OrderResponse Order response (Lighter)
+// OrderResponse Order response (Lighter API)
+// Field names must match Lighter API response exactly
 type OrderResponse struct {
-	OrderID      string  `json:"order_id"`
-	Symbol       string  `json:"symbol"`
-	Side         string  `json:"side"`
-	OrderType    string  `json:"order_type"`
-	Quantity     float64 `json:"quantity"`
-	Price        float64 `json:"price"`
-	Status       string  `json:"status"` // "open", "filled", "cancelled"
-	FilledQty    float64 `json:"filled_qty"`
-	RemainingQty float64 `json:"remaining_qty"`
-	CreateTime   int64   `json:"create_time"`
+	OrderID             string `json:"order_id"`
+	OrderIndex          int64  `json:"order_index"`
+	MarketIndex         int    `json:"market_index"`
+	Side                string `json:"side"`                  // "bid" or "ask"
+	Type                string `json:"type"`                  // "limit", "market", etc.
+	IsAsk               bool   `json:"is_ask"`                // true = sell, false = buy
+	Price               string `json:"price"`                 // Price as string
+	InitialBaseAmount   string `json:"initial_base_amount"`   // Original quantity
+	RemainingBaseAmount string `json:"remaining_base_amount"` // Remaining quantity
+	FilledBaseAmount    string `json:"filled_base_amount"`    // Filled quantity
+	Status              string `json:"status"`                // "open", "filled", "cancelled"
+	TriggerPrice        string `json:"trigger_price"`         // For stop orders
+	ReduceOnly          bool   `json:"reduce_only"`
+	Timestamp           int64  `json:"timestamp"`
+	CreatedAt           int64  `json:"created_at"`
 }
 
 // LighterTradeResponse represents the response from Lighter trades API