BlockShare - Decentralized Cloud Storage

BlockShare is a decentralized cloud storage application built using blockchain technology. It allows users to securely store and share images in a distributed manner.

Overview

This repository contains the codebase and scripts to deploy and use BlockShare, a decentralized cloud storage system leveraging blockchain for secure image storage and sharing.

Working and Implementation :

https://www.youtube.com/watch?v=wTLWqOCyp3Q

Features

• Blockchain Integration: Utilizes blockchain for decentralized file storage.
• File Encryption: Ensures security and privacy through file encryption techniques.
• User Authentication: Implements secure user authentication for accessing stored files.
• File Sharing: Facilitates easy and secure file sharing between users.
• Smart Contracts: Utilizes smart contracts for managing file storage and access permissions.

Smart Contracts

Overview

BlockShare uses smart contracts written in Solidity to manage file storage and sharing functionalities.

AccessFile

Checks user permissions and grants access to requested files.

function accessFile(address userAddress, bytes32 fileId) public view returns (bool allowed);

User Management

RegisterUser

Registers new users in the system.

function registerUser(address userAddress, string memory userEmail) public returns (bool success);

AuthenticateUser

Authenticates users for file access and management operations.

Solidity

function authenticateUser(address userAddress) public view returns (bool authenticated);

File Sharing

Allows users to share files with other registered users.

Solidity

function shareFile(address userAddress, bytes32 fileId, address recipientAddress) public returns (bool success);

Smart Contract Deployment

Deploy contracts to a local blockchain (e.g., Hardhat's built-in network):

Development Environment Setup

Ensure Node.js and npm are installed.

npm install -g hardhat

Compile Contracts

Start Hardhat Node:

npx hardhat node

Deploy Contracts

Deploy contracts to a local blockchain (e.g., Hardhat's built-in network):

npx hardhat run --network localhost scripts/deploy.js

Getting Started

Prerequisites

Ensure you have the following prerequisites installed:

• Node.js
• Hardhat
• Metamask (or other Ethereum wallet)

Installation

Clone the repository:

git clone https://github.com/your-username/blockshare.git
cd blockshare

Install dependencies

npm install

Usage

1. To start the local blockchain using Hardhat:

npx hardhat node

2. Deploy Smart Contracts

To deploy the smart contracts to a local blockchain (e.g., Hardhat's built-in network):

npx hardhat run --network localhost scripts/deploy.js

3. Start the Development Server

To start the frontend and backend servers:

cd client
npm start

Contributing

Contributions are welcome! If you have any ideas, suggestions, or improvements, please open an issue or a pull request. To contribute to BlockShare, follow these steps:

1. Fork the repository.
2. Create a new branch (git checkout -b feature/improvement).
3. Make your changes.
4. Commit your changes (git commit -am 'Add some feature').
5. Push to the branch (git push origin feature/improvement).
6. Create a new Pull Request.

License

This project is licensed under the MIT License. See the LICENSE file for details.