import (
  "fmt" 
  ob "github.com/muzykantov/orderbook"
)

func main() {
  orderBook := ob.NewOrderBook()
  fmt.Println(orderBook)
}

func (ob *OrderBook) ProcessLimitOrder(side Side, orderID string, quantity, price decimal.Decimal) (done []*Order, partial *Order, err error) { ... }

func (ob *OrderBook) ProcessMarketOrder(side Side, quantity decimal.Decimal) (done []*Order, partial *Order, quantityLeft decimal.Decimal, err error) { .. }

func (ob *OrderBook) CancelOrder(orderID string) *Order { ... }

// ProcessLimitOrder places new order to the OrderBook
// Arguments:
//      side     - what do you want to do (ob.Sell or ob.Buy)
//      orderID  - unique order ID in depth
//      quantity - how much quantity you want to sell or buy
//      price    - no more expensive (or cheaper) this price
//      * to create new decimal number you should use decimal.New() func
//        read more at https://github.com/shopspring/decimal
// Return:
//      error   - not nil if quantity (or price) is less or equal 0. Or if order with given ID is exists
//      done    - not nil if your order produces ends of anoter order, this order will add to
//                the "done" slice. If your order have done too, it will be places to this array too
//      partial - not nil if your order has done but top order is not fully done. Or if your order is
//                partial done and placed to the orderbook without full quantity - partial will contain
//                your order with quantity to left
//      partialQuantityProcessed - if partial order is not nil this result contains processed quatity from partial order
func (ob *OrderBook) ProcessLimitOrder(side Side, orderID string, quantity, price decimal.Decimal) (done []*Order, partial *Order, err error) { ... }

// ProcessMarketOrder immediately gets definite quantity from the order book with market price
// Arguments:
//      side     - what do you want to do (ob.Sell or ob.Buy)
//      quantity - how much quantity you want to sell or buy
//      * to create new decimal number you should use decimal.New() func
//        read more at https://github.com/shopspring/decimal
// Return:
//      error        - not nil if price is less or equal 0
//      done         - not nil if your market order produces ends of anoter orders, this order will add to
//                     the "done" slice
//      partial      - not nil if your order has done but top order is not fully done
//      partialQuantityProcessed - if partial order is not nil this result contains processed quatity from partial order
//      quantityLeft - more than zero if it is not enought orders to process all quantity
func (ob *OrderBook) ProcessMarketOrder(side Side, quantity decimal.Decimal) (done []*Order, partial *Order, quantityLeft decimal.Decimal, err error) { .. }

// CancelOrder removes order with given ID from the order book
func (ob *OrderBook) CancelOrder(orderID string) *Order { ... }