From aecca7fc8c70e3b915de8a900f539a99fdd5b1c8 Mon Sep 17 00:00:00 2001
From: ZhouYongyou <128128010+zhouyongyou@users.noreply.github.com>
Date: Wed, 5 Nov 2025 01:20:02 +0800
Subject: [PATCH] fix(trader): add missing GetMinNotional and CheckMinNotional
 methods These methods are required by the OpenLong/OpenShort validation but
 were missing from upstream/dev. Adds: - GetMinNotional(): Returns minimum
 notional value (10 USDT default) - CheckMinNotional(): Validates order meets
 minimum notional requirement

---
 trader/binance_futures.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/trader/binance_futures.go b/trader/binance_futures.go
index 833826d2..0698fd2d 100644
--- a/trader/binance_futures.go
+++ b/trader/binance_futures.go
@@ -550,6 +550,32 @@ func (t *FuturesTrader) SetTakeProfit(symbol string, positionSide string, quanti
 	return nil
 }
 
+// GetMinNotional 获取最小名义价值（Binance要求）
+func (t *FuturesTrader) GetMinNotional(symbol string) float64 {
+	// 使用保守的默认值 10 USDT，确保订单能够通过交易所验证
+	return 10.0
+}
+
+// CheckMinNotional 检查订单是否满足最小名义价值要求
+func (t *FuturesTrader) CheckMinNotional(symbol string, quantity float64) error {
+	price, err := t.GetMarketPrice(symbol)
+	if err != nil {
+		return fmt.Errorf("获取市价失败: %w", err)
+	}
+
+	notionalValue := quantity * price
+	minNotional := t.GetMinNotional(symbol)
+
+	if notionalValue < minNotional {
+		return fmt.Errorf(
+			"订单金额 %.2f USDT 低于最小要求 %.2f USDT (数量: %.4f, 价格: %.4f)",
+			notionalValue, minNotional, quantity, price,
+		)
+	}
+
+	return nil
+}
+
 // GetSymbolPrecision 获取交易对的数量精度
 func (t *FuturesTrader) GetSymbolPrecision(symbol string) (int, error) {
 	exchangeInfo, err := t.client.NewExchangeInfoService().Do(context.Background())