bexchange

The bexchange package is a simple limit order book implemented as a go exercise. Currently limit buys, sells, and order cancellation are all supported.

Example

package main

import (
    bx "github.com/bhomnick/bexchange"
)

func main() {
    actions := make(chan *bx.Action)
    done := make(chan bool)

    go bx.ConsoleActionHandler(actions, done)

    ob := bx.NewOrderBook(actions)
    ob.AddOrder(bx.NewOrder(1, false, 50, 50))
    ob.AddOrder(bx.NewOrder(2, false, 45, 25))
    ob.AddOrder(bx.NewOrder(3, false, 45, 25))
    ob.AddOrder(bx.NewOrder(4, true, 55, 75))
    ob.CancelOrder(1)
    ob.Done()

    <-done
}

As the order book receives commands it generates action messages that needed to be handled to ensure durability. Two channels are used in this example:

The actions channel is written to by the order book and read by an action handler. For debugging purposes a ConsoleActionHandler is included that simply prints actions to the console as they arrive.
When the Done command is issued the program should block on the action handler to finish processing outstanding actions. The done channel allows this syncrhonization.

Future features

Serialize orderbook reads and writes to add consistency across trader clients
Add a websocket layer and web interface

ztg1/bexchange

bexchange

Example

Future features