475 lines
10 KiB
Go
475 lines
10 KiB
Go
package services
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import (
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"context"
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"database/sql"
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"encoding/json"
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"fmt"
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"platform/pkg/u"
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bill2 "platform/web/domains/bill"
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resource2 "platform/web/domains/resource"
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trade2 "platform/web/domains/trade"
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g "platform/web/globals"
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"platform/web/globals/orm"
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m "platform/web/models"
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q "platform/web/queries"
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"time"
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"github.com/shopspring/decimal"
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)
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var Resource = &resourceService{}
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type resourceService struct{}
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func (s *resourceService) CreateResource(uid int32, now time.Time, ser *CreateResourceData) error {
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data, err := ser.ToData()
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if err != nil {
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return err
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}
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var name = data.GetName()
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var amount = data.GetPrice()
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// 保存交易信息
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err = q.Q.Transaction(func(q *q.Query) error {
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// 检查用户
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user, err := q.User.
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Where(q.User.ID.Eq(uid)).
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Take()
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if err != nil {
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return err
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}
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// 检查余额
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if user.Balance.Cmp(amount) < 0 {
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return ErrBalanceNotEnough
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}
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// 保存套餐
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resource, err := createResource(q, uid, now, data)
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if err != nil {
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return err
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}
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// 生成账单
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bill := m.Bill{
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UserID: uid,
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ResourceID: &resource.ID,
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BillNo: ID.GenReadable("bil"),
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Info: u.P("购买套餐 - " + name),
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Type: int32(bill2.TypeConsume),
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Amount: amount,
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}
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err = q.Bill.
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Omit(q.Bill.TradeID, q.Bill.RefundID).
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Create(&bill)
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if err != nil {
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return err
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}
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// 更新用户余额
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_, err = q.User.
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Where(q.User.ID.Eq(uid)).
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UpdateSimple(q.User.Balance.Value(user.Balance.Sub(amount)))
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if err != nil {
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return err
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}
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return nil
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}, &sql.TxOptions{Isolation: sql.LevelRepeatableRead})
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if err != nil {
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return err
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}
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return nil
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}
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func (s *resourceService) PrepareResource(uid int32, now time.Time, ser *PrepareResourceData) (*TradeCreateResult, error) {
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data, err := ser.ToData()
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if err != nil {
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return nil, err
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}
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name := data.GetName()
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amount := data.GetPrice()
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method := ser.PaymentMethod
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platform := ser.PaymentPlatform
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// 保存到数据库
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var result *TradeCreateResult
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err = q.Q.Transaction(func(q *q.Query) error {
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var err error
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// 生成交易订单
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result, err = Trade.CreateTrade(q, uid, now, &TradeCreateData{
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Subject: "购买套餐 - " + name,
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Amount: amount,
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ExpireAt: time.Now().Add(30 * time.Minute),
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Type: trade2.TypeRecharge,
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Method: method,
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Platform: platform,
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})
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if err != nil {
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return err
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}
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// 保存请求缓存
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resourceSerializer := new(PrepareResourceData)
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if err := resourceSerializer.ByData(data); err != nil {
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return err
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}
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err = g.Redis.Set(context.Background(), result.TradeNo, &PrepareResourceCache{
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Uid: uid,
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TradeId: result.Trade.ID,
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BillId: result.Bill.ID,
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PrepareResourceData: resourceSerializer,
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}, 30*time.Minute).Err()
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if err != nil {
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return err
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}
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return nil
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})
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if err != nil {
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return nil, err
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}
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return result, nil
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}
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func (s *resourceService) CompleteResource(tradeNo string, now time.Time, opResult ...*TradeSuccessResult) error {
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// 获取请求缓存
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reqStr, err := g.Redis.Get(context.Background(), tradeNo).Result()
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if err != nil {
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return err
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}
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cache := new(PrepareResourceCache)
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if err := json.Unmarshal([]byte(reqStr), cache); err != nil {
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return err
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}
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// 检查交易结果
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var rs *TradeSuccessResult
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if len(opResult) > 0 && opResult[0] != nil {
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rs = opResult[0]
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} else {
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var err error
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rs, err = Trade.VerifyTrade(&TradeVerifyData{
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TradeNo: tradeNo,
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Method: cache.PaymentMethod,
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})
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if err != nil {
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return err
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}
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}
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data, err := cache.ToData()
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if err != nil {
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return err
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}
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// 保存交易信息
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err = q.Q.Transaction(func(q *q.Query) error {
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// 完成交易
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_, err = Trade.OnTradeCreated(q, &OnTradeCreateData{
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TradeNo: tradeNo,
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TradeSuccessResult: *rs,
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})
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if err != nil {
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return fmt.Errorf("完成交易失败: %w", err)
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}
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// 保存套餐
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resource, err := createResource(q, cache.Uid, now, data)
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if err != nil {
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return fmt.Errorf("创建套餐失败: %w", err)
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}
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// 更新账单
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_, err = q.Bill.Debug().
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Select(q.Bill.ResourceID).
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Updates(&m.Bill{
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ID: cache.BillId,
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ResourceID: &resource.ID,
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})
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if err != nil {
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return fmt.Errorf("更新账单失败: %w", err)
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}
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// 删除缓存
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err = g.Redis.Del(context.Background(), tradeNo).Err()
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if err != nil {
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return fmt.Errorf("删除缓存失败: %w", err)
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}
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return nil
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})
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if err != nil {
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return err
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}
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return nil
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}
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func (s *resourceService) CancelResource(tradeNo string, now time.Time, opRevoked ...bool) error {
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// 删除请求缓存
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cacheStr, err := g.Redis.GetDel(context.Background(), tradeNo).Result()
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if err != nil {
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return err
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}
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cache := new(PrepareResourceCache)
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if err := json.Unmarshal([]byte(cacheStr), cache); err != nil {
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return err
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}
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// 取消交易
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if len(opRevoked) <= 0 {
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err = Trade.CancelTrade(tradeNo, cache.PaymentMethod)
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if err != nil {
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return err
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}
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}
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// 更新订单状态
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err = Trade.OnTradeCanceled(q.Q, tradeNo, now)
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if err != nil {
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return err
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}
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return nil
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}
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func createResource(q *q.Query, uid int32, now time.Time, data CreateTypeResourceDataInter) (*m.Resource, error) {
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// 套餐基本信息
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var resource = m.Resource{
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UserID: uid,
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ResourceNo: u.P(ID.GenReadable("res")),
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Active: true,
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}
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switch data := data.(type) {
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// 短效套餐
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case *CreateShortResourceData:
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var duration = time.Duration(data.Expire) * 24 * time.Hour
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resource.Type = int32(resource2.TypeShort)
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resource.Short = &m.ResourceShort{
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Type: data.Mode,
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Live: data.Live,
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Quota: &data.Quota,
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Expire: u.P(orm.LocalDateTime(now.Add(duration))),
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DailyLimit: data.DailyLimit,
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}
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// 长效套餐
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case *CreateLongResourceData:
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var duration = time.Duration(data.Expire) * 24 * time.Hour
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resource.Type = int32(resource2.TypeLong)
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resource.Long = &m.ResourceLong{
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Type: data.Mode,
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Live: data.Live,
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Quota: &data.Quota,
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Expire: u.P(orm.LocalDateTime(now.Add(duration))),
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DailyLimit: data.DailyLimit,
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}
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default:
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return nil, fmt.Errorf("不支持的套餐类型")
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}
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err := q.Resource.Create(&resource)
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if err != nil {
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return nil, err
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}
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return &resource, nil
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}
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type CreateTypeResourceDataInter interface {
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GetName() string
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GetPrice() decimal.Decimal
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}
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type CreateShortResourceData struct {
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Live int32 `json:"live" validate:"required,min=180"`
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Mode int32 `json:"mode" validate:"required"`
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Expire int32 `json:"expire"`
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DailyLimit int32 `json:"daily_limit" validate:"min=2000"`
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Quota int32 `json:"quota" validate:"min=10000"`
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name string
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price *decimal.Decimal
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}
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func (data *CreateShortResourceData) GetName() string {
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if data.name == "" {
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var mode string
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switch data.Mode {
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case 1:
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mode = "包时"
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case 2:
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mode = "包量"
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}
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data.name = fmt.Sprintf("短效动态%s %v 分钟", mode, data.Live/60)
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}
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return data.name
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}
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func (data *CreateShortResourceData) GetPrice() decimal.Decimal {
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if data.price == nil {
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var factor int32
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switch data.Mode {
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case 1:
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factor = data.DailyLimit * data.Expire
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case 2:
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factor = data.Quota
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}
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var base = data.Live
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if base == 180 {
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base = 150
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}
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var dec = decimal.Decimal{}.
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Add(decimal.NewFromInt32(base * factor)).
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Div(decimal.NewFromInt(30000))
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data.price = &dec
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}
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return *data.price
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}
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type CreateLongResourceData struct {
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Live int32 `json:"live" validate:"required,oneof=1 4 8 12 24"`
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Mode int32 `json:"mode" validate:"required,oneof=1 2"`
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Expire int32 `json:"expire"`
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DailyLimit int32 `json:"daily_limit" validate:"min=100"`
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Quota int32 `json:"quota" validate:"min=500"`
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name string
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price *decimal.Decimal
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}
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func (data *CreateLongResourceData) GetName() string {
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if data.name == "" {
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var mode string
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switch data.Mode {
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case 1:
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mode = "包时"
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case 2:
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mode = "包量"
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}
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data.name = fmt.Sprintf("长效动态%s %d 小时", mode, data.Live)
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}
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return data.name
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}
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func (data *CreateLongResourceData) GetPrice() decimal.Decimal {
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if data.price == nil {
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var factor int32 = 0
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switch resource2.Mode(data.Mode) {
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case resource2.ModeTime:
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factor = data.Expire * data.DailyLimit
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case resource2.ModeCount:
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factor = data.Quota
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}
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var base int32
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switch data.Live {
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case 1:
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base = 30
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case 4:
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base = 80
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case 8:
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base = 120
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case 12:
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base = 180
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case 24:
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base = 350
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}
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// data.price = big.NewRat(int64(base*factor), 100)
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var dec = decimal.Decimal{}.
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Add(decimal.NewFromInt32(base * factor)).
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Div(decimal.NewFromInt(100))
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data.price = &dec
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}
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return *data.price
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}
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type CreateResourceData struct {
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Type resource2.Type `json:"type" validate:"required"`
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Short *CreateShortResourceData `json:"short,omitempty"`
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Long *CreateLongResourceData `json:"long,omitempty"`
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}
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func (s *CreateResourceData) ToData() (CreateTypeResourceDataInter, error) {
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switch s.Type {
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case resource2.TypeShort:
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return s.Short, nil
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case resource2.TypeLong:
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return s.Long, nil
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}
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return nil, fmt.Errorf("不支持的套餐类型")
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}
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func (s *CreateResourceData) ByData(data CreateTypeResourceDataInter) error {
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switch data := data.(type) {
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case *CreateShortResourceData:
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s.Type = resource2.TypeShort
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s.Short = data
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case *CreateLongResourceData:
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s.Type = resource2.TypeLong
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s.Long = data
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default:
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return fmt.Errorf("不支持的套餐类型")
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}
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return nil
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}
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type PrepareResourceData struct {
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CreateResourceData
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PaymentMethod trade2.Method `json:"payment_method" validate:"required"`
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PaymentPlatform trade2.Platform `json:"payment_platform" validate:"required"`
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}
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type PrepareResourceCache struct {
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Uid int32 `json:"uid"`
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TradeId int32 `json:"trade_id"`
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BillId int32 `json:"bill_id"`
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*PrepareResourceData
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}
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func (c PrepareResourceCache) MarshalBinary() (data []byte, err error) {
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data, err = json.Marshal(c)
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if err != nil {
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return nil, err
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}
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return data, nil
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}
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func (c PrepareResourceCache) UnmarshalBinary(data []byte) error {
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if err := json.Unmarshal(data, &c); err != nil {
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return err
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}
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return nil
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}
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type ResourceServiceErr string
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func (e ResourceServiceErr) Error() string {
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return string(e)
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}
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const (
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ErrBalanceNotEnough = ResourceServiceErr("余额不足")
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)
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