Certificate Verification System Using BlockChain ( скачать в хорошем качестве

Certificate Verification System Using BlockChain (

🔗 Blockchain Certificate Verification System | Ethereum + Solidity + React | Full Project Explanation In this video, I built a Blockchain Based Certificate Verification System from scratch using Ethereum blockchain. This project solves a real world problem — fake certificates. Using blockchain technology, certificates are stored as tamper-proof SHA-256 hashes on a smart contract that nobody can edit or delete. Ever. 🛠️ Tech Stack Used: Solidity — Smart Contract Hardhat — Local Ethereum Blockchain ethers.js — Blockchain Connection React.js — Frontend Website MetaMask — Crypto Wallet 📌 What you will learn: What is blockchain and why it's useful for certificates How to write a Solidity smart contract How to deploy a contract using Hardhat How to connect MetaMask to a local blockchain How to verify certificates by ID and by file upload How SHA-256 hashing works for document verification ⏱️ Timestamps: 0:00 — Introduction and problem statement 2:00 — Technical implementation and code walkthrough 8:00 — Running the project and seeing live output 14:00 — MetaMask connection and admin features 18:00 — Outro 💻 How to run this project: Install Node.js and VS Code Run npm install Run npx hardhat node Run npm run deploy:local Run cd frontend && npm install && npm start Open http://localhost:3000 🔐 How it works: University uploads certificate → app calculates SHA-256 hash → hash stored permanently on Ethereum blockchain Employer uploads same certificate → app calculates same hash → checks blockchain → instantly verified ✅ If certificate is fake → hash won't match → NOT FOUND ❌ 📚 This project is perfect for: College final year projects Blockchain beginners Web3 developers learning Solidity Anyone interested in document verification systems ⚠️ Note: This project runs on a local Hardhat blockchain for demonstration purposes. No real ETH is used. All certificates and transactions are completely fake and only exist on your local computer. If this helped you, please Like 👍 Subscribe 🔔 and Comment below with any questions! #blockchain #ethereum #solidity #react #metamask #hardhat #web3 #blockchainproject #certificateverification #collegeproject #ethers #smartcontract #decentralized #crypto #defi #javascript #nodejs #programming #coding #tutorial