Blockchain-Based Decentralized File Sharing System

A blockchain-based decentralised file sharing system without a central server.

A blockchain-based decentralised file sharing system without a central server. As a reference project it shows how a system like this is put together in practice, which parts matter and how they are tested, so that a developer can learn from it and build on it.

It suits learners who want to build decentralised applications: designing smart contracts, testing them, connecting a front end through a wallet and reasoning about security and cost.

The main parts are smart contracts for the core rules, a front end connected through a wallet, tamper-evident records on the chain, and automated contract tests. The reference build uses Solidity, Ethereum, Hardhat, and Web3.js, with a clear project structure, setup instructions and sample data so that it can be run and extended.