PaperTrader

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This django application is an online paper trading platform for cryptocurrencies. "A paper trade is a simulated trade that allows an investor to practice buying and selling without risking real money"

Requirements

• Postgres
• Redis
• Poetry

Quick start

poetry install
make db
make crypto_sockets
# In another terminal
make serve

Project architecture

There are three main parts to this app the django web server which serves data to the user, websocket connection through which the frontend receives real time data from the backend, and a consumer that receives real time data from a third party api and push it to the django server.

Django server

Serves static files, user and cryptocurrency data to the frontend. The websocket connections and messages from the frontend is also run on the server.

Websocket server

The websocket connections between the server and the frontend are how the frontend is able to receive realtime data. This is done using django channels. When a user goes to view a certain cryptocurrency the frontend attempts to establish a websocket connection and sends the serve the cryptocurrency_id and the user_id if there is one. The cryptocurrency_id is used to ignore messages from the real time data consumer if the message is for a different cryptocurrency which prevents a server from pushing irrelevant data. If the user is logged in the frontend sends a user_id, the backend uses the id query the database for the users shares which are used to calculate other data such as percent_change and equity_change.

Real time data consumer

Real time data consumer, consumes the gemini websocket api for realtime candle stick data. When a message comes in the data is store, processed then sent to the crypto channels group which the Websocket server receives and sends to the front end.