A version based key-value store. There are different methods of storing and tracking multiple versions of a record based on database you are using and requirement. I am using mongodb, storing all versions in a same collection with timestamp as version number.

Keybase Exposes API with following endpoints

1. POST /object Accepts a key(string) and value(some json blob/string) and stores them in mongodb database.If an existing key is sent,new version of document is created with updated values
2. GET /object/:key Accept a key and return the latest value of the key.this enpoint also accepts timestamp as query parameter. GET /object/:key?timestamp= (unix timestamp in miliseconds) returns the value of the key at that particular time. if timpestamp is before creation of key, API will return 404 not found.

http://ec2-13-126-254-11.ap-south-1.compute.amazonaws.com:3000/

• Node LTS version(8.11.1)
• Mocha and Chai for Testing
• MongoDB

• clone repoistory.
• cd into the directory.
• run npm install
• run npm start or node src/index.js

• npm test

• docker-compose up if it doesn't work may be u need to change mongodb service volumes path as it different on Mac