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transaction.go
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/
transaction.go
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package service
import (
"context"
"fmt"
"github.com/shopspring/decimal"
)
type (
SecuritiesType int8
TransactionRecordType int8
)
const (
STOCK SecuritiesType = iota
ETF
)
const (
OPENING TransactionRecordType = iota
BUY
SELL
CLEAR
)
type Securities struct {
UserId string
FundNo string
Type SecuritiesType
Code string
Name string
Volumn int64
ClosePrice float64
}
func Buy(ctx context.Context, securities *Securities) error {
if securities == nil {
return fmt.Errorf("securities is nil")
}
fund, err := FundWithOneByFundNo(ctx, securities.FundNo)
if err != nil {
return err
}
stock, err := StockWithGetOne(ctx, securities.Code)
if err != nil {
return err
}
requiredFund := decimal.NewFromFloat(securities.ClosePrice).Mul(decimal.NewFromInt(securities.Volumn))
if requiredFund.GreaterThan(fund.EndCash) {
return fmt.Errorf("no enough fund")
}
_ = stock
return nil
}
func Sell(ctx context.Context, securities *Securities) error {
return nil
}