A simple orderbook API microservice to use in crypro exchange market using Laravel.

The algorithm used for storing and retrieving bids and asks in this microservice is based on Redis Sorted Sets. Redis Sorted Sets allow you to store prices along with their associated quantities. The scores(prices) are used to keep the elements(quantities) sorted.

Storing and retrieving orders with this algorithm has a time complexity of O(log(N)).

Running Project

This project is built with Laravel Framework 10.

1. Clone the repository using git

   git clone https://github.com/sasani72/orderbook-microservice.git

2. cd into the folder created for cloned project:

   cd orderbook-microservice

3. Pull and build images using docker compose

   docker compose up -d

4. Run this script to initialize the laravel project

   docker compose exec app /usr/src/app/setup.sh

5. Create Kafka topics

   docker compose exec kafka bash
   kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1 --topic new-order
   kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1 --topic cancel-order
   exit

6. Running Kafka producer command to produce data streams

   docker compose exec app bash
   php artisan kafka:produce-order

7. Running Kafka consumer command to consume data streams

   php artisan kafka:consume-order

8. Start Laravel local server

    php artisan serve

9. You can now open another terminal to send requests for orderbooks:

     curl -X GET "http://localhost:8000/api/orderbook?symbol=ETHUSDT&depth=200"

License

Licensed under the MIT license.