first commit
This commit is contained in:
@@ -0,0 +1,433 @@
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package service
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import (
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"context"
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"encoding/json"
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"log/slog"
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"time"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/global"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/dto"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/mysqldao"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/mysqlmodel"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/redisdao"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/redismodel"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/pkg/errcode"
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"git.lzcwy.cn/zhengchiliu/zt-closet-backend/pkg/wechat"
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"github.com/redis/go-redis/v9"
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)
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// VirtualOrderCreate 创建虚拟支付订单：本地落单（pay_channel=2）并返回前端调起
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// wx.requestVirtualPayment 所需的 signData / paySig / signature。
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func (s *OrderService) VirtualOrderCreate(ctx context.Context, userID int64, request *dto.VirtualOrderCreateRequest) (*dto.VirtualOrderCreateResponse, *errcode.Error) {
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ctx, span := global.Tracer.Start(ctx, "svc.VirtualOrderCreate")
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defer span.End()
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if !wechat.IsVirtualPayEnabled() {
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return nil, errcode.VirtualPayNotEnabled
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}
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// 订单记录当前激活的虚拟支付环境（现网 0 / 沙箱 1），发货推送按此校验。
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xpayEnv, verr := wechat.GetVirtualPayEnv()
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if verr != nil {
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return nil, errcode.VirtualPayNotEnabled
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}
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goods, err := s.goodsDao.GoodsGetByCode(ctx, request.GoodsCode)
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if err != nil {
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if isNotFound(err) {
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return nil, errcode.GoodsNotFound
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}
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return nil, errcode.DatabaseError
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}
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if goods.Status != GoodsStatusOnShelf {
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return nil, errcode.GoodsOffShelf
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}
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if goods.ProductID == "" || goods.ProductStatus != GoodsProductPublished {
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return nil, errcode.VirtualPayGoodsNotPublished
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}
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// iOS 端微信限制最低支付 1 元（100 分），低于此金额调起支付必失败，提前拒绝以降低垃圾订单。
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// 注意：platform 由前端上报（不可作为安全边界，可伪造为 android 绕过此限制）；
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// 此校验仅作体验优化，不构成资损防线——真正的资损防线是发货推送 verifyXPayOrderPaid
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// 对微信侧订单真实性、金额、道具的反查。低金额商品在 iOS 上的垃圾订单靠过期清理兜底。
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if request.Platform == XPayPlatformIOS && goods.DiscountPrice < 100 {
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return nil, errcode.VirtualPayAmountTooLow
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}
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// 虚拟支付 signature 依赖用户 session_key（登录时缓存），缺失说明需重新登录。
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sessionKey, serr := redisdao.AuthSessionKeyGet(ctx, userID)
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if serr != nil {
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if serr == redis.Nil {
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return nil, errcode.UnauthorizedTokenError.WithDetails("缺少 session_key，请重新登录")
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}
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return nil, errcode.CacheError
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}
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orderNo := genOrderNo()
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expireTime := nowUnix() + orderPayTTLSeconds
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payAmount := goods.DiscountPrice
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platform := request.Platform
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order := &mysqlmodel.Order{
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OrderNo: orderNo,
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UserID: userID,
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GoodsID: goods.ID,
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GoodsName: goods.GoodsName,
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UnitPrice: goods.DiscountPrice,
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TotalAmount: payAmount,
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PayAmount: payAmount,
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PayChannel: PayChannelVirtual,
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OrderStatus: OrderStatusPending,
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MemberDays: goods.MemberDays,
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CosQuota: goods.CosQuota,
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AIRecommendQuota: goods.AIRecommendQuota,
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ClosetShareQuota: goods.ClosetShareQuota,
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OutfitShareQuota: goods.OutfitShareQuota,
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ExpireTime: expireTime,
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XPayProductID: goods.ProductID,
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XPayPlatform: platform,
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XPayEnv: int8(xpayEnv),
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}
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if cerr := s.orderDao.OrderCreate(ctx, order); cerr != nil {
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return nil, errcode.VirtualOrderCreateFailed
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}
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sign, perr := wechat.BuildPaymentSign(
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global.VirtualPaySetting.OfferID,
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goods.ProductID,
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orderNo,
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"",
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sessionKey,
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payAmount,
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)
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if perr != nil {
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return nil, errcode.VirtualOrderCreateFailed
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}
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return &dto.VirtualOrderCreateResponse{
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OrderNo: orderNo,
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PayAmount: payAmount,
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ExpireTime: expireTime,
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SignData: sign.SignData,
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PaySig: sign.PaySig,
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Signature: sign.Signature,
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}, nil
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}
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// ---- 消息推送回调 ----
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// XPayNotify 处理虚拟支付消息推送（发货/退款/iOS 退款问询/其它），返回应答报文。
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func (s *OrderService) XPayNotify(ctx context.Context, raw []byte) []byte {
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ctx, span := global.Tracer.Start(ctx, "svc.XPayNotify")
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defer span.End()
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base, err := wechat.ParseNotify(raw)
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if err != nil {
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slog.ErrorContext(ctx, "xpay notify parse failed", "error", err)
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return wechat.BuildNotifyResponse(false)
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}
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switch base.Event {
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case wechat.EventGoodsDeliverNotify:
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var deliver wechat.XPayGoodsDeliverNotify
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if err := json.Unmarshal(raw, &deliver); err != nil {
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slog.ErrorContext(ctx, "xpay deliver notify decode failed", "error", err)
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return wechat.BuildNotifyResponse(false)
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}
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if e := s.handleGoodsDeliver(ctx, &deliver, string(raw)); e != nil {
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slog.ErrorContext(ctx, "xpay deliver notify handle failed", "error", e)
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return wechat.BuildNotifyResponse(false)
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}
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return wechat.BuildNotifyResponse(true)
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case wechat.EventRefundNotify:
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var refund wechat.XPayRefundNotify
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if err := json.Unmarshal(raw, &refund); err != nil {
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slog.ErrorContext(ctx, "xpay refund notify decode failed", "error", err)
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return wechat.BuildNotifyResponse(false)
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}
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if e := s.handleRefundNotify(ctx, &refund); e != nil {
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slog.ErrorContext(ctx, "xpay refund notify handle failed", "error", e)
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return wechat.BuildNotifyResponse(false)
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}
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return wechat.BuildNotifyResponse(true)
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case wechat.EventIOSRefundQueryNotify:
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var query wechat.XPayIOSRefundQueryNotify
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if err := json.Unmarshal(raw, &query); err != nil {
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slog.ErrorContext(ctx, "xpay ios refund query decode failed", "error", err)
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return wechat.BuildNotifyResponse(false)
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}
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return s.handleIOSRefundQuery(ctx, &query)
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default:
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// 投诉/代币/风控等推送：结构化记录即可，暂不实现业务。
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slog.WarnContext(ctx, "xpay notify ignored", "event", base.Event, "out_trade_no", base.OutTradeNo)
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return wechat.BuildNotifyResponse(true)
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}
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}
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// verifyXPayOrderPaid 反查微信侧订单真实性：消息推送无签名，发货前必须通过
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// query_order（带 HMAC 签名的服务端 API）确认订单已真实支付、金额与道具一致，
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// 防止伪造发货推送零成本获取权益。任一校验不通过返回错误（fail-closed，触发微信重试）。
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func (s *OrderService) verifyXPayOrderPaid(ctx context.Context, order *mysqlmodel.Order, deliver *wechat.XPayGoodsDeliverNotify) *errcode.Error {
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if deliver.OpenID == "" {
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slog.ErrorContext(ctx, "xpay deliver: empty openid", "order_no", order.OrderNo)
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return errcode.OrderRealityCheckFailed
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}
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info, err := wechat.QueryOrder(ctx, deliver.OpenID, deliver.OutTradeNo, "")
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if err != nil {
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slog.ErrorContext(ctx, "xpay deliver: query order failed",
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"order_no", order.OrderNo, "error", err)
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return errcode.OrderRealityCheckFailed
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}
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// 微信侧无支付记录/未支付：伪造推送或数据异常，拒绝发放。
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if !wechat.IsOrderPaidStatus(info.Status) {
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slog.ErrorContext(ctx, "xpay deliver: order not paid in wechat side",
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"order_no", order.OrderNo, "query_status", info.Status)
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return errcode.OrderRealityCheckFailed
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}
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// 反查金额与道具必须与下单快照一致（资损防线）。
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if info.PayFee != order.PayAmount {
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slog.ErrorContext(ctx, "xpay deliver: query amount mismatch",
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"order_no", order.OrderNo, "query_amount", info.PayFee, "order_amount", order.PayAmount)
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return errcode.OrderRealityCheckFailed
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}
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if info.ProductID != order.XPayProductID {
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slog.ErrorContext(ctx, "xpay deliver: query product mismatch",
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"order_no", order.OrderNo, "query_product", info.ProductID, "order_product", order.XPayProductID)
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return errcode.OrderRealityCheckFailed
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}
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return nil
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}
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// verifyXPayRefund 反查微信侧退款真实性：退款推送无签名，回退权益前必须通过
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// query_order（带 HMAC 签名的服务端 API）确认订单在微信侧已真实退款、金额一致，
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// 防止伪造退款推送回收权益。任一校验不通过返回错误（fail-closed，触发微信重试）。
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func (s *OrderService) verifyXPayRefund(ctx context.Context, order *mysqlmodel.Order, refund *wechat.XPayRefundNotify) *errcode.Error {
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if refund.OpenID == "" {
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slog.ErrorContext(ctx, "xpay refund: empty openid", "order_no", order.OrderNo)
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return errcode.OrderRealityCheckFailed
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}
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info, err := wechat.QueryOrder(ctx, refund.OpenID, refund.OutTradeNo, "")
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if err != nil {
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slog.ErrorContext(ctx, "xpay refund: query order failed",
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"order_no", order.OrderNo, "error", err)
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return errcode.OrderRealityCheckFailed
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}
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// 微信侧无退款记录/未退款：伪造推送或数据异常，拒绝回退权益。
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if !wechat.IsOrderRefundedStatus(info.RefundStatus) {
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slog.ErrorContext(ctx, "xpay refund: order not refunded in wechat side",
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"order_no", order.OrderNo, "refund_status", info.RefundStatus)
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return errcode.OrderRealityCheckFailed
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}
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// 反查退款金额必须与推送一致（资损防线）。
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if info.RefundFee != refund.RefundFee {
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slog.ErrorContext(ctx, "xpay refund: refund amount mismatch",
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"order_no", order.OrderNo, "query_refund_fee", info.RefundFee, "notify_refund_fee", refund.RefundFee)
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return errcode.OrderRealityCheckFailed
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}
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return nil
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}
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// handleGoodsDeliver 处理道具发货推送：幂等锁 + 金额/道具校验 + 条件流转 + 发放权益。
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func (s *OrderService) handleGoodsDeliver(ctx context.Context, deliver *wechat.XPayGoodsDeliverNotify, raw string) *errcode.Error {
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lockKey := fmtLockKey(redismodel.KeyLockPayCallback, deliver.OutTradeNo)
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lockVal := genUUID()
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if ok, _ := redisdao.TryLock(ctx, lockKey, lockVal, 30*time.Second); !ok {
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return nil // 并发回调，交由持锁者处理。
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}
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defer func() { _ = redisdao.Unlock(ctx, lockKey, lockVal) }()
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order, gerr := s.orderDao.OrderGetByOrderNo(ctx, deliver.OutTradeNo)
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if gerr != nil {
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if isNotFound(gerr) {
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slog.ErrorContext(ctx, "xpay deliver: order not found", "out_trade_no", deliver.OutTradeNo)
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return errcode.OrderRealityCheckFailed
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}
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return errcode.DatabaseError
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}
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// 仅虚拟支付订单走此链路，防止与普通支付回调串单。
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if order.PayChannel != PayChannelVirtual {
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slog.ErrorContext(ctx, "xpay deliver: order not virtual pay", "order_no", order.OrderNo, "pay_channel", order.PayChannel)
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return errcode.OrderRealityCheckFailed
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}
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// 防篡改：道具 ID 与实付金额必须与下单快照一致。
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if deliver.GoodsInfo.ProductID != order.XPayProductID {
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slog.ErrorContext(ctx, "xpay deliver: product mismatch",
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"order_no", order.OrderNo, "notify_product", deliver.GoodsInfo.ProductID, "order_product", order.XPayProductID)
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return errcode.OrderRealityCheckFailed
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}
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if deliver.GoodsInfo.ActualPrice != order.PayAmount {
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slog.ErrorContext(ctx, "xpay deliver: amount mismatch",
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"order_no", order.OrderNo, "notify_amount", deliver.GoodsInfo.ActualPrice, "order_amount", order.PayAmount)
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return errcode.OrderRealityCheckFailed
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}
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// 防环境串单：沙箱推送不得发放现网订单。
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if int8(deliver.Env) != order.XPayEnv {
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slog.ErrorContext(ctx, "xpay deliver: env mismatch",
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"order_no", order.OrderNo, "notify_env", deliver.Env, "order_env", order.XPayEnv)
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return errcode.OrderRealityCheckFailed
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}
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// 订单真实性反查：消息推送无签名，必须反查微信侧订单确认真实支付，
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// 防止伪造发货推送零成本获取权益；未通过返回错误 -> 应答 ErrCode:1，微信重试。
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if verr := s.verifyXPayOrderPaid(ctx, order, deliver); verr != nil {
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return verr
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}
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// 条件流转：待支付 -> 已支付，防重复回调。
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updated, uerr := s.orderDao.OrderUpdateStatusByOrderNo(ctx, deliver.OutTradeNo, OrderStatusPending, OrderStatusPaid)
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if uerr != nil {
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return errcode.DatabaseError
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}
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if updated {
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s.finalizeVirtualPaidOrder(ctx, order, deliver, raw)
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return nil
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}
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// 流转失败：处理「订单已过期但用户实际已付款」的竞态（与普通支付 PayNotify 一致）。
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current, gerr := s.orderDao.OrderGetByOrderNo(ctx, deliver.OutTradeNo)
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if gerr != nil {
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if isNotFound(gerr) {
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return nil
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}
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return errcode.DatabaseError
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}
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switch current.OrderStatus {
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case OrderStatusPaid:
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// 已被并发回调处理，兜底补发（幂等）。
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_ = s.orderDao.OrderUpdateByOrderNo(ctx, current.OrderNo, map[string]any{
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"pay_time": resolvePaidTime(deliver.WeChatPayInfo.PaidTime),
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"transaction_id": deliver.WeChatPayInfo.TransactionID,
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"callback_raw": raw,
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})
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s.grantOrderBenefits(ctx, current)
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case OrderStatusExpired:
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// 订单被系统过期但用户已付款：过期 -> 已支付并补发货。
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if ok, uerr := s.orderDao.OrderUpdateStatusByOrderNo(ctx, deliver.OutTradeNo, OrderStatusExpired, OrderStatusPaid); uerr != nil {
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return errcode.DatabaseError
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} else if ok {
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s.finalizeVirtualPaidOrder(ctx, current, deliver, raw)
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}
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case OrderStatusCancelled:
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// 防御分支：历史上已取消的虚拟支付订单用户仍完成了支付，补发货避免「钱已扣、权益不到账」。
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// 当前虚拟支付订单已禁止取消，此分支兜底存量数据与并发竞态。
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if ok, uerr := s.orderDao.OrderUpdateStatusByOrderNo(ctx, deliver.OutTradeNo, OrderStatusCancelled, OrderStatusPaid); uerr != nil {
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return errcode.DatabaseError
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} else if ok {
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s.finalizeVirtualPaidOrder(ctx, current, deliver, raw)
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}
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}
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return nil
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}
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// handleRefundNotify 处理退款推送：复用退款成功回退权益链路（settleRefundSuccess）。
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func (s *OrderService) handleRefundNotify(ctx context.Context, refund *wechat.XPayRefundNotify) *errcode.Error {
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lockKey := fmtLockKey(redismodel.KeyLockRefundCallback, refund.RefundOrderID)
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lockVal := genUUID()
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if ok, _ := redisdao.TryLock(ctx, lockKey, lockVal, 30*time.Second); !ok {
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return nil
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}
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defer func() { _ = redisdao.Unlock(ctx, lockKey, lockVal) }()
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// 白名单判断：仅「退款成功」才回退权益；空串/未知/中间状态仅记录，防止误回退
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// （退款推送按官方文档在退款完成时触发，状态枚举联调时以官方为准）。
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if refund.RefundStatus != wechat.XPayRefundStatusSuccess {
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slog.WarnContext(ctx, "xpay refund notify not success, skip revoke",
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"order_no", refund.OutTradeNo, "refund_status", refund.RefundStatus)
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return nil
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}
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order, gerr := s.orderDao.OrderGetByOrderNo(ctx, refund.OutTradeNo)
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if gerr != nil {
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if isNotFound(gerr) {
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slog.ErrorContext(ctx, "xpay refund: order not found", "out_trade_no", refund.OutTradeNo)
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return nil
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}
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return errcode.DatabaseError
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}
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// 已终态则幂等返回。
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if order.OrderStatus == OrderStatusRefunded {
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return nil
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}
|
||||
|
||||
// 订单真实性反查：退款推送无签名，回退权益前必须反查微信侧确认真实退款，
|
||||
// 防止伪造退款推送回收权益；未通过返回错误 -> 应答 ErrCode:1，微信重试。
|
||||
if verr := s.verifyXPayRefund(ctx, order, refund); verr != nil {
|
||||
return verr
|
||||
}
|
||||
|
||||
// settleRefundSuccess 内部含条件流转（Paid -> Refunded），重复推送不会重复回退。
|
||||
s.settleRefundSuccess(ctx, order, refund.RefundFee)
|
||||
return nil
|
||||
}
|
||||
|
||||
// handleIOSRefundQuery 处理 iOS 退款问询（3 秒内应答，仅本地查询）。
|
||||
// 按权益使用情况细化：权益已消耗则拒绝退款（result_code=1 + evidence），未消耗则建议退款；
|
||||
// 建议退款后权益由后续退款推送 settleRefundSuccess 回收（回收链路保证「已消耗部分不回退」）。
|
||||
func (s *OrderService) handleIOSRefundQuery(ctx context.Context, query *wechat.XPayIOSRefundQueryNotify) []byte {
|
||||
order, err := s.orderDao.OrderGetByOrderNo(ctx, query.OutTradeNo)
|
||||
if err != nil {
|
||||
slog.ErrorContext(ctx, "xpay ios refund query: order not found", "out_trade_no", query.OutTradeNo, "error", err)
|
||||
return wechat.BuildIOSRefundQueryResponse(1, "order not found")
|
||||
}
|
||||
if order.OrderStatus == OrderStatusRefunded {
|
||||
return wechat.BuildIOSRefundQueryResponse(0, "already refunded")
|
||||
}
|
||||
// 权益已消耗则拒绝退款，防止「已使用权益后白嫖退款」。
|
||||
if s.iosRefundBenefitsConsumed(ctx, order) {
|
||||
return wechat.BuildIOSRefundQueryResponse(1, "权益已使用，不支持退款")
|
||||
}
|
||||
return wechat.BuildIOSRefundQueryResponse(0, order.OrderNo)
|
||||
}
|
||||
|
||||
// iosRefundBenefitsConsumed 判断订单发放的权益是否已被消耗（用于 iOS 退款问询拒绝策略）。
|
||||
// 额度类：Cos 凭证已用 >0 视为已消耗；会员类：会员已生效（在有效期内）视为已使用。
|
||||
func (s *OrderService) iosRefundBenefitsConsumed(ctx context.Context, order *mysqlmodel.Order) bool {
|
||||
// 额度类：该订单发放的 Cos 凭证已消耗则视为已使用。
|
||||
if order.CosQuota > 0 {
|
||||
grants, err := mysqldao.NewQuotaGrantDao().QuotaGrantListByUserIDAndType(ctx, order.UserID, QuotaTypeCos)
|
||||
if err == nil {
|
||||
for _, g := range grants {
|
||||
if g.RefID == order.OrderNo && g.Used > 0 {
|
||||
return true
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// 会员类：会员已生效（vip_expire 在未来且非非会员），说明用户已开始享受会员权益。
|
||||
if order.MemberDays > 0 {
|
||||
if user, err := s.userDao.UserGetByID(ctx, order.UserID); err == nil {
|
||||
if user.VIPExpire > nowUnix() && user.VIPType != VIPTypeNone {
|
||||
return true
|
||||
}
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// finalizeVirtualPaidOrder 虚拟支付发货：记录支付信息、发放权益并发送通知。
|
||||
func (s *OrderService) finalizeVirtualPaidOrder(ctx context.Context, order *mysqlmodel.Order, deliver *wechat.XPayGoodsDeliverNotify, raw string) {
|
||||
_ = s.orderDao.OrderUpdateByOrderNo(ctx, order.OrderNo, map[string]any{
|
||||
"pay_time": resolvePaidTime(deliver.WeChatPayInfo.PaidTime),
|
||||
"transaction_id": deliver.WeChatPayInfo.TransactionID,
|
||||
"callback_raw": raw,
|
||||
})
|
||||
|
||||
s.grantOrderBenefits(ctx, order)
|
||||
|
||||
sendNotification(ctx, order.UserID, 0, NotificationTypeOrder, "订单支付成功", "你购买的「"+order.GoodsName+"」已到账")
|
||||
}
|
||||
|
||||
// resolvePaidTime 兜底支付时间：推送字段缺失/非法（<=0）时用当前时间，避免 pay_time 写入 0。
|
||||
func resolvePaidTime(paidTime int64) int64 {
|
||||
if paidTime <= 0 {
|
||||
return nowUnix()
|
||||
}
|
||||
return paidTime
|
||||
}
|
||||
Reference in New Issue
Block a user