🧾 User Profile Smart Contract

This project is a submission for a Lisk Bootcamp assignment. It includes a Solidity smart contract that enables users to register, update, and retrieve their personal profile information securely on the blockchain.

Project Overview The UserProfile.sol smart contract provides a decentralized on-chain identity system. It ensures:

Each address can only register once.

Profile data is stored and managed securely.

Registration timestamps are automatically recorded.

Core Features User Registration Register a profile with name, age, and email.

Profile Updates Update your profile details at any time.

Profile Retrieval View your own registered profile information.

Duplicate Prevention Prevents the same address from registering multiple times.

Timestamping Records block.timestamp during registration.

🧰 Technology Stack Tool Description Solidity Smart contract programming language Hardhat Development environment & testing framework JavaScript Used for writing deployment and test scripts

Getting Started Follow these steps to set up and run the project locally.

Prerequisites Node.js (Install from nodejs.org)

npm (comes with Node.js)

📥 Installation Clone the repository:

bash Copy Edit git clone <YOUR_GITHUB_REPO_URL> Navigate into the project folder:

bash Copy Edit cd <YOUR_PROJECT_FOLDER> Install dependencies:

bash Copy Edit npm install 🧪 Hardhat Commands Here are the main commands you'll use during development:

🔨 Compile the Contract Checks for syntax and builds contract artifacts:

bash Copy Edit npx hardhat compile 🧬 Run Tests Runs automated tests from the test/ directory:

bash Copy Edit npx hardhat test

🧱 Start a Local Blockchain Runs a local Ethereum network for development:

bash Copy Edit npx hardhat node

📦 Deploy the Contract Deploys the UserProfile contract to the local network:

bash Copy Edit npx hardhat run scripts/deploy.js --network localhost

📂 Folder Structure (Optional Add-On) bash Copy Edit project-root/ ├── contracts/ │ └── UserProfile.sol ├── scripts/ │ └── deploy.js ├── test/ │ └── userProfile.test.js ├── hardhat.config.js └── package.json

🧠 Notes Make sure your local node is running before deploying.

Only one profile can be registered per wallet address.

Test and deploy using the Hardhat local network before trying on public testnets.