Trying to grasp the concept of the stock market, this is the most straightforward implementation that I could come up with.
I may have misinterpreted concepts and/or rules. Can take hints from you.
I modeled the engine to behave similarly to what is described in the Bristol Stock Exchange. Haven't copied the code itself, just relied on the simple description here.
if you just run it and not edit the code, you can install without dev dependencies like this:
npm install --production
otherwise:
npm install
requires a recent version of node.js and npm. this should suffice:
npm start
(delete or rename the prestart script if you installed with --production flag)
then visit: http://127.0.0.1:3030
The stock market server runs a simple HTPP server with CORS.
The toy-stock-market-client NPM module exposes an abstract client to aid consume this API on either the browser or node.js.
See here
All endpoints accept GETs, receive argument in the path and return JSON data.
/register (name / pass / money) -> token
/login (name / pass) -> token
/logout (token)
/bid (token, stockName, price, quantity)
/ask (token, stockName, price, quantity)
/stock () -> array of stock names
/stock (stockName) -> lob, consisting of: array of binds, array of asks
/transactions () -> array of transactions
/stats () -> closing ts, nr stocks
/ () -> version and start time
/stream () -> server sent events JSON stream (for bids, asks, transactions. differentiate by kind)
The stock data structures, types and core functions live in stock.js.
All of these are simple structures in memory. Performance is not a big concern in this exploratory initiative.
The HTTP server is set up from server.js.
To prepare an initial state populating content, edit bootstrap.js.
- add a basic HTML UI to interact with the stock market -> ongoing, see toy-stock-market-ui
- create 1 or more bots to simulate it working and possibly different strategies -> ongoing, see toy-stock-market-bot