Bazar-Server

A server for decentralized micro-blog

Features

• Record user info
• Record posts (including reply and repost)
• Record followings
• Record likes
• Record userID changes based on BazarRealIDService

Technical

Design for privacy under hostile environment

• Any server do NOT keep any user private data, not keep privateKey, not keep email address, etc.

Design for unlimited users

• Every server kept limited userdata.
• Every client can upload any command of anyone to a server, as long as the command itself can be verified by publicKey.

BazarServer

• Will forward all userCommands to every know server.
• Every server will choose what data to storage. Usually active user only.
• Every server can try retrieve data from another server.
• Any one can throw any message to any server at any time. Server is designed to survive in such chaos battlefield.

Architecture

Developer

Need environment variables to run this webapp

• BazarBaseUrl = 'which domain-path is this server deployed'. eg: https://api.yourdomain.com/bazar/ or https://bzea.azurewebsites.net/
• BazarMongodb = 'mongodb connectionString'

Mongodb changestream

• Because changestream has various limitation, we will not use changestream.

BazarServer Should only run one instance for each MongoDB

• Because we need to maintain receiveOffset for this instance, while MongoDB do not support auto-increment id.
• We will separate reader to dedicate module for better performance. Reader can run multiple instances. receiveOffset will help reader work better.

This is a BASE system

• Basically Available, Soft State, Eventual Consistency.
• We tolerate temporary inconsistency for simplicity and availability.

Thanks

Inspired by Twitter, Telegram, Signal and Mastodon