BlockChat - Decentralized Messaging DApp

BlockChat is a decentralized messaging DApp (decentralized application) built on the Ethereum blockchain. It enables users to securely exchange messages and files without relying on centralized intermediaries, ensuring privacy, security, and censorship resistance.

Features

• Secure Messaging: Messages are encrypted and stored on the blockchain, ensuring tamper-proof communication.
• File Sharing: Users can securely share files using IPFS (InterPlanetary File System), with files stored off-chain for efficiency.
• Smart Contract Integration: BlockChat leverages Ethereum smart contracts for trustless interactions and transparent record-keeping.
• User-Friendly Interface: Intuitive UI/UX design for seamless navigation and user experience.
• Recipient Address Management: Users can store and manage recipient addresses for easy access to contacts.

Tools Used

• Ethereum Blockchain: Foundation for decentralized messaging and smart contract execution.
• IPFS (InterPlanetary File System): Decentralized file storage protocol for efficient and secure file sharing.
• Web3.js: JavaScript library for interacting with Ethereum blockchain and smart contracts.
• MetaMask: Ethereum wallet and gateway to blockchain applications.
• Solidity: Smart contract programming language for Ethereum.
• HTML/CSS/JavaScript: Frontend development stack for building the user interface and client-side logic.

Usage

BlockChat offers a user-friendly and intuitive platform for secure messaging and file sharing, powered by blockchain technology. Users can easily navigate through the application to communicate with friends, colleagues, and other contacts in a decentralized and privacy-enhanced manner. Below is a guide on how to use BlockChat effectively:

Prerequisites:

• Ensure you have MetaMask installed and set up with an Ethereum account.
• Install XAMPP or another local server environment to host the BlockChat application locally.
• Or start using the application right away: https://blochat.netlify.app/

Creating an Account:

• To use BlockChat, users need to have an Ethereum account.
• Users can create or import an Ethereum account using MetaMask, a popular Ethereum wallet and browser extension.

Connecting MetaMask:

• Before accessing BlockChat, users need to connect their MetaMask wallet to the application.
• MetaMask provides secure authentication and transaction signing for interacting with the Ethereum blockchain.

Storing Recipient Addresses:

• Users can store recipient addresses within BlockChat for easy access when sending messages and files.
• Simply enter the recipient's Ethereum address and click the "Store Recipient Address" button.

Sending Messages:

• To send a message, select the recipient's address from the dropdown menu.
• Type the message content in the input field and click the "Send" button.
• The message is transmitted securely to the recipient via the Ethereum blockchain.

Sending Files:

• Users can send files securely through BlockChat using the integrated file transfer feature.
• Click the file input button to select the file from your device.
• Once selected, click the "Send" button to initiate the file transfer.
• Files are uploaded to the IPFS network for decentralized storage, and the IPFS hash is recorded on the Ethereum blockchain.

Viewing Messages and Files:

• Users can view their messages and files within the chat interface.
• Messages are displayed in chronological order, along with timestamps indicating when they were sent.
• Files are presented as clickable links, allowing users to download and view them directly from the IPFS network.

Clearing Chat History:

• Users have the option to clear their chat history with a specific recipient.
• Click the "Clear Chat" button to remove all messages and files exchanged with the selected recipient.
• This action is irreversible and permanently deletes the chat history from the Ethereum blockchain.