🏆 Reputation / Achievement Tracker

A simple Solidity smart contract that tracks user reputation points, achievements, and badges on-chain.
It introduces key Solidity concepts such as mappings, structs, arrays, and events.

📜 Description

The ReputationTracker contract allows users to:

• Earn points for actions

• Unlock achievements

• Receive badges stored on-chain

• Retrieve their entire reputation profile anytime

This is a great beginner-to-intermediate Solidity project to understand user data storage and interaction within a contract.

⚙️ Contract Details

• Contract Name: ReputationTracker

• Solidity Version: ^0.8.0

• License: MIT

💻 Contract Code

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract ReputationTracker {
    struct User {
        uint points;
        uint achievements;
        string[] badges;
    }

    mapping(address => User) public users;

    event PointsAdded(address indexed user, uint newPoints);
    event AchievementUnlocked(address indexed user, string badgeName);

    function addPoints(uint _points) public {
        users[msg.sender].points += _points;
        emit PointsAdded(msg.sender, users[msg.sender].points);
    }

    function unlockBadge(string memory _badgeName) public {
        users[msg.sender].achievements += 1;
        users[msg.sender].badges.push(_badgeName);
        emit AchievementUnlocked(msg.sender, _badgeName);
    }

    function getUser(address _user) public view returns (uint, uint, string[] memory) {
        User storage user = users[_user];
        return (user.points, user.achievements, user.badges);
    }
}

🧠 Key Concepts

🚀 How to Use (Remix IDE)

1. Open Remix IDE

2. Create a new file named ReputationTracker.sol

3. Paste the contract code above

4. Compile using Solidity 0.8.x

5. Deploy the contract

6. Interact with the following functions:

🧩 Example Usage

🔥 Possible Extensions

• Add a function to transfer reputation between users

• Add admin-only access for awarding points

• Add leaderboard logic for top users

• Integrate with a frontend (React + Web3.js) for a gamified UI

📄 License

This project is licensed under the MIT License.