This repository contains a suite of on-chain identity & reputation smart contracts developed by Lorebit Studio to demonstrate a transparent, non-transferable achievement and reputation system deployed on Base Sepolia.
This project showcases a robust, fully on-chain identity system using soulbound (non-transferable) NFTs and ERC20 tokens to track user achievements and reputation.
It includes contracts for:
- Awarding achievements as NFTs for key milestones.
- Awarding reputation points as soulbound ERC20 tokens.
- Preventing transfers of both NFTs & reputation points (soulbound).
- Managing user registration and automatically awarding registration achievements.
Lorebit Studio developed all smart contracts, deployment scripts, verification scripts, and testing utilities for this showcase:
- SoulboundNFT: Non-transferable ERC721 NFT that records user achievements.
- SoulboundReputation: Non-transferable ERC20 token that awards reputation points.
- UserRegistration: Contract for user registration that awards an achievement.
| Contract | Description |
|---|---|
| SoulboundNFT.sol | ERC721 soulbound NFT contract awarding unique achievements per user. |
| SoulboundReputation.sol | ERC20 soulbound reputation point system where users rate each other. |
| UserRegistration.sol | Handles user registration and mints a registration achievement. |
✅ Soulbound NFTs (non-transferable) to record achievements.
✅ Soulbound ERC20 reputation points (non-transferable).
✅ Awards users for their first rating and for registering.
✅ Prevents self-rating and duplicate ratings.
✅ Fully verified on Base Sepolia block explorer.
✅ Uses OpenZeppelin security primitives (Ownable, AccessControl, ReentrancyGuard).
This Soulbound Identity Suite architecture is flexible and can be integrated into various on-chain and hybrid systems, such as:
- 🎮 Web3 games — award players for key milestones, leaderboards, or contributions.
- 🛒 Marketplaces — track reputation & contributions of buyers/sellers.
- 🏦 DAOs — measure contributions to governance and community engagement.
- 👨🏫 Learning platforms — reward learners with certificates & points for achievements.
- 🧩 Any dApp — where on-chain identity & reputation enhance trust and engagement.
You can adapt the achievement types, reputation mechanisms, and registration flow to fit specific business needs — supporting ERC20, ERC721, ERC1155, or even hybrid on/off-chain logic.
Contracts Owner:
0xB94503C6a717BDD677ad9dAB7B450AF86d3Aa3F5
| Contract | Address |
|---|---|
| SoulboundNFT | 0xc3BAa93807F505dD3adDDAaa29Eb795EE4f8f4f0 |
| SoulboundReputation | 0x8a72B2205dc5C5a1DD9dD0E8110639ed9e2E6B71 |
| UserRegistration | 0xA7842Ac2C2B01f620285294e6c2A0EaF5e8f9acd |
Lorebit Studio Portfolio Project A demonstration of decentralized soulbound identity, reputation, and achievements on an EVM L2 testnet.
Lorebit Studio Smart Contract Development • Tokenomics Design • Fullstack Blockchain Engineering
🌐 lorebitstudio.com
✉️ contact@lorebitstudio.com
This repository is licensed under the MIT License.
This repository is intended for portfolio and showcase purposes. If you are interested in hiring Lorebit Studio or using these contracts commercially, please get in touch!