feat: 手续费改为逐笔USD累算 + Vite React前端 + system_orders表 + README

db/trade_repo.go

@@ -48,6 +48,20 @@ type OrderRecord struct {
 	CreatedAt time.Time
 }
 
+// SystemOrderRecord represents one system-level arbitrage action (entry/scale/exit).
+type SystemOrderRecord struct {
+	ID        int64
+	TradeID   int64
+	Type      string // entry / scale / exit
+	Status    string // filled / failed
+	Spread    *float64
+	LongPrice *float64
+	ShortPrice *float64
+	LongOrderID  *int64
+	ShortOrderID *int64
+	CreatedAt time.Time
+}
+
 // SaveTrade inserts a new trade and returns its ID.
 func (d *DB) SaveTrade(t *TradeRecord) (int64, error) {
 	res, err := d.Exec(`INSERT INTO trades (
@@ -150,6 +164,20 @@ func (d *DB) SaveOrder(o *OrderRecord) (int64, error) {
 	return res.LastInsertId()
 }
 
+// SaveSystemOrder inserts a system-level order record.
+func (d *DB) SaveSystemOrder(o *SystemOrderRecord) (int64, error) {
+	res, err := d.Exec(`INSERT INTO system_orders
+		(trade_id, type, status, spread, long_price, short_price, long_order_id, short_order_id, created_at)
+		VALUES (?,?,?,?,?, ?,?,?,?)`,
+		o.TradeID, o.Type, o.Status, o.Spread,
+		o.LongPrice, o.ShortPrice, o.LongOrderID, o.ShortOrderID, o.CreatedAt,
+	)
+	if err != nil {
+		return 0, err
+	}
+	return res.LastInsertId()
+}
+
 // GetTradeByID returns a single trade with its orders.
 func (d *DB) GetTradeByID(id int64) (*TradeRecord, []OrderRecord, error) {
 	row := d.QueryRow(`SELECT id, coin, direction, status, entry_spread, exit_spread,
@@ -222,4 +250,4 @@ func (d *DB) GetClosedStats() (converged, diverged, flat, total int, err error)
 		return
 	}
 	return
-}
+}