fix

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

@@ -2,14 +2,14 @@ package service
 
 import (
 	"context"
-	"tydata-server/app/main/api/internal/config"
-	"tydata-server/app/main/model"
-	"tydata-server/common/ctxdata"
-	"tydata-server/pkg/lzkit/lzUtils"
 	"fmt"
 	"net/http"
 	"strconv"
 	"time"
+	"tydata-server/app/main/api/internal/config"
+	"tydata-server/app/main/model"
+	"tydata-server/common/ctxdata"
+	"tydata-server/pkg/lzkit/lzUtils"
 
 	"github.com/wechatpay-apiv3/wechatpay-go/core"
 	"github.com/wechatpay-apiv3/wechatpay-go/core/auth/verifiers"
@@ -137,10 +137,15 @@ func newWechatPayServiceWithWxPayPubKey(c config.Config, userAuthModel model.Use
 	}
 
 	// 初始化 notify.Handler
-	certificateVisitor := downloader.MgrInstance().GetCertificateVisitor(mchID)
+	// 使用公钥方式时，certificateVisitor 可能为 nil，直接使用公钥验证器
 	notifyHandler := notify.NewNotifyHandler(
 		mchAPIv3Key,
-		verifiers.NewSHA256WithRSACombinedVerifier(certificateVisitor, mchPublicKeyID, *mchPublicKey))
+		verifiers.NewSHA256WithRSACombinedVerifier(nil, mchPublicKeyID, *mchPublicKey))
+	
+	if notifyHandler == nil {
+		logx.Errorf("创建 notifyHandler 失败")
+		panic("初始化失败，服务停止: notifyHandler 为 nil")
+	}
 
 	logx.Infof("微信支付客户端初始化成功(微信支付公钥方式)")
 	return &WechatPayService{
@@ -294,6 +299,9 @@ func (w *WechatPayService) CreateWechatOrder(ctx context.Context, amount float64
 
 // HandleWechatPayNotification 处理微信支付回调
 func (w *WechatPayService) HandleWechatPayNotification(ctx context.Context, req *http.Request) (*payments.Transaction, error) {
+	if w.notifyHandler == nil {
+		return nil, fmt.Errorf("微信支付通知处理器未初始化")
+	}
 	transaction := new(payments.Transaction)
 	_, err := w.notifyHandler.ParseNotifyRequest(ctx, req, transaction)
 	if err != nil {
@@ -305,6 +313,9 @@ func (w *WechatPayService) HandleWechatPayNotification(ctx context.Context, req
 
 // HandleRefundNotification 处理微信退款回调
 func (w *WechatPayService) HandleRefundNotification(ctx context.Context, req *http.Request) (*refunddomestic.Refund, error) {
+	if w.notifyHandler == nil {
+		return nil, fmt.Errorf("微信支付通知处理器未初始化")
+	}
 	refund := new(refunddomestic.Refund)
 	_, err := w.notifyHandler.ParseNotifyRequest(ctx, req, refund)
 	if err != nil {