exchange_go/services/binanceservice/reduce_order_strategy_service.go

package binanceservice

import (
	"fmt"
	"go-admin/app/admin/models"
	"go-admin/app/admin/service/dto"
	"go-admin/common/const/rediskey"
	"go-admin/common/global"
	"go-admin/common/helper"
	models2 "go-admin/models"

	"github.com/bytedance/sonic"
	"github.com/go-admin-team/go-admin-core/logger"
	"github.com/shopspring/decimal"
	"gorm.io/gorm"
)

// 缓存减仓节点和重新生成
// reduceOrder:原始减仓单
// reduceOrderStrategy:减仓策略
func CacheOrderStrategyAndReCreate(db *gorm.DB, reduceOrder ReduceListItem, symbolType int, tradeSet models2.TradeSet, setting models.LineSystemSetting) error {
	reduceOrderStrategy := models.LineReduceStrategy{}
	var key string

	if symbolType == 1 {
		key = fmt.Sprintf(rediskey.SpotOrderReduceStrategyList, global.EXCHANGE_BINANCE)
	} else {
		key = fmt.Sprintf(rediskey.FutOrderReduceStrategyList, global.EXCHANGE_BINANCE)
	}

	if err := db.Model(&reduceOrderStrategy).Where("order_id =?", reduceOrder.Id).Find(reduceOrderStrategy).Error; err != nil {
		logger.Errorf("获取减仓策略失败,err:%v", err)
		return err
	}

	if reduceOrderStrategy.Id > 0 {
		strategyCache := dto.LineOrderReduceStrategyResp{
			OrderId: reduceOrder.Id,
		}

		for _, item := range reduceOrderStrategy.Items {
			var rate decimal.Decimal
			var triggerRate decimal.Decimal

			if reduceOrder.Side == "BUY" {
				rate = (decimal.NewFromInt(100).Sub(item.LossPercent)).Div(decimal.NewFromInt(100))

				if setting.ReduceEarlyTriggerPercent.Cmp(decimal.Zero) > 0 {
					triggerRate = rate.Add(setting.ReduceEarlyTriggerPercent.Div(decimal.NewFromInt(100)))
				} else {
					triggerRate = rate
				}
			} else {
				rate = (decimal.NewFromInt(100).Add(item.LossPercent)).Div(decimal.NewFromInt(100))

				if setting.ReduceEarlyTriggerPercent.Cmp(decimal.Zero) > 0 {
					triggerRate = rate.Sub(setting.ReduceEarlyTriggerPercent.Div(decimal.NewFromInt(100)))
				} else {
					triggerRate = rate
				}
			}
			price := reduceOrder.Price.Mul(rate).Truncate(int32(tradeSet.PriceDigit))
			triggerPrice := reduceOrder.Price.Mul(triggerRate).Truncate(int32(tradeSet.PriceDigit))

			strategyCache.Items = append(strategyCache.Items, dto.LineOrderReduceStrategyRespItem{
				LossPercent:  item.LossPercent,
				OrderType:    item.OrderType,
				Price:        price,
				TriggerPrice: triggerPrice,
			})
		}

		str, _ := sonic.MarshalString(reduceOrderStrategy)

		if str != "" {
			if err := helper.DefaultRedis.SetString(key, str); err != nil {
				logger.Errorf("减仓单缓存减仓策略,err:%v", err)
			}
		}
	}

	return nil
}

// 根据订单id获取订单减仓策略
func GetReduceStrategyById(db *gorm.DB, orderId int) (models.LineOrderReduceStrategy, error) {
	result := models.LineOrderReduceStrategy{}

	if err := db.Model(result).Where("order_id =?", orderId).Select("id", "order_id").First(&result).Error; err != nil {
		return result, err
	}

	return result, nil
}

// 减仓单成功回调
func ReduceCallBack(db *gorm.DB, preOrder *models.LinePreOrder) error {
	reduceOrderId := preOrder.Id
	var key string
	if preOrder.ReduceOrderId > 0 {
		reduceOrderId = preOrder.ReduceOrderId
	}

	switch preOrder.SymbolType {
	case 1:
		key = fmt.Sprintf(rediskey.SpotOrderReduceStrategyList, global.EXCHANGE_BINANCE)
	case 2:
		key = fmt.Sprintf(rediskey.FutOrderReduceStrategyList, global.EXCHANGE_BINANCE)
	default:
		return fmt.Errorf("交易对类型错误")
	}

	arrays, _ := helper.DefaultRedis.GetAllList(key)
	cache := dto.LineOrderReduceStrategyResp{}

	for _, v := range arrays {
		sonic.Unmarshal([]byte(v), &cache)

		if cache.OrderId == reduceOrderId {
			if _, err := helper.DefaultRedis.LRem(key, v); err != nil {
				logger.Errorf("移除减仓单减仓策略失败redis err:%v", err)
			}
		}
	}

	orderReduceStrategy, _ := GetReduceStrategyById(db, reduceOrderId)
	if orderReduceStrategy.Id > 0 {
		if err := db.Model(&orderReduceStrategy).Update("actived", 1).Error; err != nil {
			logger.Errorf("更新减仓单减仓策略状态失败 order_id:%d err:%v", orderReduceStrategy.OrderId, err)
		}
	}

	return nil
}