fix2

app/main/api/internal/service/wechatpayService.go

@@ -25,6 +25,14 @@ import (
 	"github.com/zeromicro/go-zero/core/logx"
 )
 
+// wxpayAPIHTTPStatus 安全读取微信支付 API 的 HTTP 状态码；部分错误路径下 result 可能为 nil（例如本地签名失败）。
+func wxpayAPIHTTPStatus(result *core.APIResult) int {
+	if result == nil || result.Response == nil {
+		return 0
+	}
+	return result.Response.StatusCode
+}
+
 const (
 	TradeStateSuccess    = "SUCCESS"    // 支付成功
 	TradeStateRefund     = "REFUND"     // 转入退款
@@ -174,7 +182,7 @@ func (w *WechatPayService) CreateWechatAppOrder(ctx context.Context, amount floa
 	// 发起预支付请求
 	resp, result, err := svc.Prepay(ctx, payRequest)
 	if err != nil {
-		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, result.Response.StatusCode)
+		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, wxpayAPIHTTPStatus(result))
 	}
 
 	// 返回预支付交易会话标识
@@ -199,14 +207,23 @@ func jsapiRequestPaymentToMap(resp *jsapi.PrepayWithRequestPaymentResponse) (map
 	if resp.Package != nil {
 		m["package"] = *resp.Package
 	}
-	if resp.SignType != nil {
+	if resp.SignType != nil && *resp.SignType != "" {
 		m["signType"] = *resp.SignType
+	} else {
+		m["signType"] = "RSA"
 	}
 	if resp.PaySign != nil {
 		m["paySign"] = *resp.PaySign
 	}
-	if len(m) != 6 {
-		return nil, fmt.Errorf("微信 JSAPI 调起参数不完整")
+	var missing []string
+	for _, key := range []string{"appId", "timeStamp", "nonceStr", "package", "paySign"} {
+		if m[key] == "" {
+			missing = append(missing, key)
+		}
+	}
+	if len(missing) > 0 {
+		logx.Errorf("[WechatPay] JSAPI 调起参数缺项: missing=%v resp=%s", missing, resp.String())
+		return nil, fmt.Errorf("微信 JSAPI 调起参数不完整: 缺少或为空 %v", missing)
 	}
 	return m, nil
 }
@@ -235,7 +252,7 @@ func (w *WechatPayService) CreateWechatMiniProgramOrder(ctx context.Context, amo
 	// 发起预支付请求
 	resp, result, err := svc.PrepayWithRequestPayment(ctx, payRequest)
 	if err != nil {
-		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, result.Response.StatusCode)
+		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, wxpayAPIHTTPStatus(result))
 	}
 	return jsapiRequestPaymentToMap(resp)
 }
@@ -265,7 +282,7 @@ func (w *WechatPayService) CreateWechatH5Order(ctx context.Context, amount float
 	resp, result, err := svc.PrepayWithRequestPayment(ctx, payRequest)
 	logx.Infof("微信h5支付订单：resp: %+v, result: %+v, err: %+v", resp, result, err)
 	if err != nil {
-		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, result.Response.StatusCode)
+		return "", fmt.Errorf("微信支付订单创建失败: %v, 状态码: %d", err, wxpayAPIHTTPStatus(result))
 	}
 	return jsapiRequestPaymentToMap(resp)
 }
@@ -363,7 +380,7 @@ func (w *WechatPayService) QueryOrderStatus(ctx context.Context, transactionID s
 		Mchid:         core.String(w.config.Wxpay.MchID),
 	})
 	if err != nil {
-		return nil, fmt.Errorf("订单查询失败: %v, 状态码: %d", err, result.Response.StatusCode)
+		return nil, fmt.Errorf("订单查询失败: %v, 状态码: %d", err, wxpayAPIHTTPStatus(result))
 	}
 	return resp, nil