entity

type Asset struct {
	ID           string
	Name         string
	MarketVolume int
}

type Book struct {
	Order         []*Order
	Transactions  []*Transaction
	InputChannel  chan *Order // input
	OutputChannel chan *Order
	WaitGroup     *sync.WaitGroup
}

type Investor struct {
	ID            string
	Name          string
	AssetPosition []*InvestorAssetPosition
}

type InvestorAssetPosition struct {
	ID     string
	Shares int
}

type Order struct {
	ID            string
	Investor      *Investor
	Asset         *Asset
	Shares        int
	PendingShares int
	Price         float64
	OrderType     OrderType
	Status        OrderStatus
	Transactions  []*Transaction
}

type OrderQueue struct {
	Orders []*Order
}

type OrderStatus string

type OrderType string

type Transaction struct {
	ID           string
	SellingOrder *Order
	BuyingOrder  *Order
	Shares       int
	Price        float64
	Total        float64
	DateTime     time.Time
}