feat(退款): AUG26-006 退款方式选择与原路退款
按 PRD 2.3/2.4/2.5 落地套餐退款的方式矩阵与原路渠道退款： - 退款申请派生并冻结权威实收金额（线上取原成功支付记录，钱包/线下取订单实际收款）， 提交人不可填写或修改；按来源支付方式生成可选方式矩阵并在创建、提交、执行前重复校验。 - 审批切换为「每次提交一条不可变审批尝试记录 + 独立企业微信审批实例」，业务标识取尝试 记录主键；终态消费按尝试记录优先、退款申请兜底双读，兼容存量无实例与已关联实例申请。 新增活动退款部分唯一索引 (order_id) WHERE status IN (1,5,6)。 - 本地人工终审保持既有开关，补齐通过入口的 approval_instance_id IS NULL 守卫，使三个 入口一致拒绝已关联审批实例的申请；重提按尝试模式重写（仅已拒绝/已退回/原路失败且无异常）。 - 权益时点：企微通过事务写退款终态、按方式确定的订单态、钱包回款、员工账单冲销与可靠 失效事实；套餐失效/接续/停机仍由既有可靠机制最终一致执行，不把外部调用放入资金事务。 订单支付状态按方式置位：凭证退款与退回原钱包在企微通过时置已退款，原路须渠道明确成功。 - 按官方契约实现微信直连 v3、微信 v2（双向证书）、富友（/commonRefund 与 /refundQuery）、 支付宝四类原路退款；能力只由服务商类型与退款必需凭证完整性决定，无人工开关。 渠道请求号在提交时冻结到尝试记录，并以 channel_submitted_at 条件认领保证资金动作至多 提交一次（重复投递只查询不二次提交）；不向任何渠道传递退款结果通知地址。 - 新增 refund:channel:recovery 恢复任务只查询回填；本地查询窗口超期（富友 72 小时、 微信 v2 7 天）转原路退款失败、渠道状态已失败、分类超时未知并置异常转人工，不放行自动 重提以避免重复退款。 - 同步退款 DTO/导出/审计资源与审计查询关联、商户凭证文档，并修正 fuiou 集成契约文档。 迁移 000218（退款尝试与渠道退款事实）、000219（微信 v2 客户端证书凭证）成对提供， 未修改既有迁移；测试库 junhong_cmp_test 完成 up/down/up 与行为核对，未调用真实渠道。
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105
internal/infrastructure/audit/refund_channel.go
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105
internal/infrastructure/audit/refund_channel.go
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package audit
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import (
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"context"
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"strconv"
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"gorm.io/gorm"
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"github.com/break/junhong_cmp_fiber/internal/model"
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"github.com/break/junhong_cmp_fiber/pkg/auditcontext"
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"github.com/break/junhong_cmp_fiber/pkg/constants"
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"github.com/break/junhong_cmp_fiber/pkg/errors"
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)
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// WriteRefundChannelResult 在调用方事务内写入渠道原路退款的调用、恢复与异常事实。
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//
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// 主资源固定为退款单，渠道原路退款事实作为引用资源；快照只记录业务标识、金额、状态与
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// 结构化失败分类，不记录商户密钥、渠道报文或客户收款信息原文。摘要由调用方提供，
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// 必须为不含凭证与渠道报文的简短中文说明。
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//
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// 渠道调用与恢复都由后台任务触发，因此操作者固定为系统任务；审计上下文提供了更具体的
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// 操作者标识时沿用，避免任务未装配审计上下文时审计被拒绝并连带回滚业务事务。
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func (w *Writer) WriteRefundChannelResult(ctx context.Context, tx *gorm.DB, refund *model.RefundRequest, action, message string) error {
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if refund == nil || refund.ID == 0 || refund.RefundNo == "" {
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return errors.New(errors.CodeInvalidParam, "退款渠道审计资源不完整")
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}
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summary := message
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if summary == "" {
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summary = "渠道原路退款结果更新"
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}
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refundID := strconv.FormatUint(uint64(refund.ID), 10)
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actorID, actorName := constants.AuditActorIDRefundChannel, "退款渠道原路退款任务"
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if linkage := auditcontext.From(ctx); linkage.ActorID != "" {
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actorID = linkage.ActorID
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if linkage.ActorName != "" {
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actorName = linkage.ActorName
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}
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}
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resources := refundChannelResources(refund, refundID, summary)
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// 用 AppendAndGet 而非 Append：渠道调用与恢复的审计属于「要求成功必达」的事实，
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// 必须与业务事实同事务原子提交，失败时向调用方显式返回错误。
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if _, err := w.AppendAndGet(ctx, tx, AppendInput{
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ActionCode: action, Summary: summary,
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Actor: ActorInput{Kind: constants.AuditActorSystemTask, ID: actorID, Name: actorName},
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Source: constants.AuditSourceWorker, ScopeType: constants.AuditScopePlatform,
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Result: constants.AuditResultSuccess, CorrelationID: refund.RefundNo, Resources: resources,
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}); err != nil {
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return errors.Wrap(errors.CodeDatabaseError, err, "写入退款渠道审计失败")
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}
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return nil
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}
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// refundChannelResources 构造退款渠道审计资源：退款单为主资源，渠道原路退款事实为引用资源。
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func refundChannelResources(refund *model.RefundRequest, refundID, summary string) []ResourceInput {
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return []ResourceInput{
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{
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Type: constants.AuditResourceRefund, ID: &refundID, Key: refund.RefundNo, DisplayName: refund.RefundNo,
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Relation: constants.AuditResourceRelationPrimary, Role: constants.AuditResourceRoleRefundTarget,
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IdentitySnapshot: map[string]any{
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"id": refund.ID, "refund_no": refund.RefundNo, "method": refund.Method,
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"frozen_actual_received_amount": refund.FrozenActualReceivedAmount,
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"requested_refund_amount": refund.RequestedRefundAmount,
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"approved_refund_amount": refund.ApprovedRefundAmount,
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"status": refund.Status,
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"channel_refund_status": refund.ChannelRefundStatus,
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"channel_refund_no": refund.ChannelRefundNo,
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"channel_refund_request_no": refund.ChannelRefundRequestNo,
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"channel_refund_amount": refund.ChannelRefundAmount,
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"failure_reason": refund.FailureReason,
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"anomaly_flag": refund.AnomalyFlag,
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},
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AfterData: channelRefundState(refund),
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SubjectVisibility: constants.AuditSubjectResult, SubjectSummary: summary,
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},
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{
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Type: constants.AuditResourceRefundChannelRefund, ID: &refundID, Key: refund.RefundNo,
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DisplayName: "渠道原路退款 " + refund.RefundNo,
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Relation: constants.AuditResourceRelationReference, Role: constants.AuditResourceRoleRefundChannelRefund,
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IdentitySnapshot: map[string]any{
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"id": refund.ID, "refund_no": refund.RefundNo,
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"channel_refund_status": refund.ChannelRefundStatus,
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"channel_refund_no": refund.ChannelRefundNo,
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"channel_refund_request_no": refund.ChannelRefundRequestNo,
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"channel_refund_amount": refund.ChannelRefundAmount,
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"failure_reason": refund.FailureReason,
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"anomaly_flag": refund.AnomalyFlag,
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},
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},
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}
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}
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// channelRefundState 构造渠道原路退款状态快照，只包含状态与结构化失败分类。
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func channelRefundState(refund *model.RefundRequest) map[string]any {
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state := map[string]any{
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"status": refund.Status,
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"channel_refund_status": refund.ChannelRefundStatus,
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"channel_refund_amount": refund.ChannelRefundAmount,
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"failure_reason": refund.FailureReason,
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"anomaly_flag": refund.AnomalyFlag,
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}
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if refund.ChannelRefundedAt != nil {
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state["channel_refunded_at"] = *refund.ChannelRefundedAt
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}
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return state
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}
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