Document Registry and Timestamp DApp

This Solidity DApp enables users to register document hashes on the blockchain with associated timestamps. It serves as a reliable method for proving the existence and integrity of documents at specific points in time.

Overview

The Document Registry and Timestamp DApp is a decentralized application built using Solidity for the Ethereum Virtuam Machine (EVM) compatible blockchains, plus an HTML/ JavaScript/ CSS web interface. It allows users to securely register document hashes along with relevant metadata, thereby establishing a tamper-proof record of the document's existence at a particular moment. The project combines the transparency and immutability of the blockchain with the cryptographic security of hashing algorithms to ensure the integrity and validity of the registered documents.

Features

• Secure and transparent registration of document hashes on the Ethereum blockchain, with timestamp association for accurate recording of document existence and integrity verification.
• User-friendly interface for seamless interaction with the smart contract using Web3.
• No need of a trusted third party thank to the use of blockchain.

Usage

Registration

• Connect your Ethereum wallet to the DApp by clicking the "Connect Wallet" button.
• Upload a file; the DApp will automatically generate the hash of the document.
• Provide additional details such as the document name and description.
• Click the "Add Document" button to register the document on the blockchain.

Document checking

• Connect your Ethereum wallet to the DApp by clicking the "Connect Wallet" button.
• Upload a file; the DApp will automatically generate the hash of the document.
• Click the “Search document" button to check who and when has registered the uploaded file on the blockchain.

Check your documents

• Click the “Get your documents” buttons to retrieve all your document registration.

Links

Web3 interface

Live version of this app on my website.

Deployed and verified contract

• Ethereum (not yet deployed).
• Goerli (Ethereum test network).
• Sepolia (Ethereum test network).
• Polygon.
• Polygon Mumbay (Polygon test network).

Running Tests

To run the tests for this contract you need a Foundry project set up. Please read the README.md file of the Foundry tests folder for further details.

License

This project is licensed under the MIT License - see the LICENSE.md file for details.