⭐ Soroban Reputation System

📌 Overview

The Soroban Reputation System is a decentralized smart contract built on the Stellar Soroban platform that enables trust-based scoring for users using their wallet addresses.

This project demonstrates how to build a lightweight, efficient, and scalable on-chain reputation mechanism using Soroban smart contracts.

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🎯 Project Description

In decentralized ecosystems, trust is difficult to establish due to the absence of centralized authorities. This project introduces a reputation layer that allows users to gain or lose credibility based on interactions.

The system ensures:

• Transparent reputation tracking
• Immutable on-chain storage
• Fast and low-cost execution

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⚙️ What It Does

• Initializes a decentralized reputation storage system
• Assigns reputation scores to wallet addresses
• Allows increasing and decreasing reputation
• Retrieves reputation of any user
• Stores all data securely on-chain

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✨ Key Features

• 🔐 Fully decentralized reputation tracking
• ⚡ Ultra-lightweight smart contract (~1.4 KB WASM)
• ➕ Add reputation points
• ➖ Subtract reputation points
• 🔍 Query user reputation instantly
• 🧩 Easily integratable into Web3 dApps

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🏗️ Smart Contract Functions

Function	Description
init()	Initializes reputation storage
add_rep()	Adds reputation points to a user
subtract_rep()	Deducts reputation points from a user
get_rep()	Returns the reputation score of a user

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🛠️ Tech Stack

• Language: Rust
• Framework: Soroban SDK
• Blockchain: Stellar (Soroban Smart Contracts)

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🚀 Build Details

• ✅ Build Status: Successful

• 📦 WASM Size: 1402 bytes

• 🔑 Exported Functions:

  • add_rep
  • get_rep
  • init
  • subtract_rep

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🚀 Deployment

🔗 Contract Address

CBNVPIUS3AJTM7GVUMPDXHD2UU37MAXVXJAT2B7KUIK2ZYAKYJ575QUN

🌐 Explorer Links

• 🔍 Stellar Expert: https://stellar.expert/explorer/testnet/contract/CBNVPIUS3AJTM7GVUMPDXHD2UU37MAXVXJAT2B7KUIK2ZYAKYJ575QUN

• 🧪 Stellar Lab: https://lab.stellar.org/r/testnet/contract/CBNVPIUS3AJTM7GVUMPDXHD2UU37MAXVXJAT2B7KUIK2ZYAKYJ575QUN

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🚀 How to Build

rustup default stable
rustup target add wasm32v1-none
stellar contract build

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🚀 How to Deploy

stellar contract deploy \
  --wasm target/wasm32v1-none/release/contract.wasm \
  --source-account alice \
  --network testnet \
  --alias reputation_system

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🧪 Example Usage

Get Reputation

stellar contract invoke \
  --id CBNVPIUS3AJTM7GVUMPDXHD2UU37MAXVXJAT2B7KUIK2ZYAKYJ575QUN \
  --fn get_rep \
  --arg USER_ADDRESS

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💡 Use Cases

• 🧑‍💻 Freelance platforms (client/worker rating systems)
• 🗳️ DAO governance (member credibility scoring)
• 🛒 Marketplace trust systems (seller reputation)
• 🌐 Decentralized social platforms
• 🤝 Peer-to-peer trust layer

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🔮 Future Enhancements

• Role-based access control (admin/moderator)
• Anti-abuse mechanisms
• Reputation decay over time
• Event logging and analytics
• NFT-based reputation badges
• Tokenized reputation system

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📂 Project Structure

contract/
│── contracts/
│   └── contract/
│       └── src/
│           └── lib.rs
│── target/
│── Cargo.toml
│── README.md

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📜 License

MIT License

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👨‍💻 Author

Surajit Ghosh

• GitHub: https://github.com/YOUR_USERNAME
• LinkedIn: https://linkedin.com/in/YOUR_PROFILE

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⭐ Support

If you found this project useful, consider giving it a ⭐ on GitHub!