jkjarvis / geminiassignment

Gemini Backend Assignment

Jobcoin Mixer

The Jobcoin Mixer is a simple implementation of a mixer for the virtual currency Jobcoin. It allows users to obfuscate their transaction flow and maintain privacy on the Jobcoin network.

Table of Contents

• Introduction
• Usage
• Code Structure
• Next Steps

Introduction

The Jobcoin Mixer is designed to provide privacy for Jobcoin transactions by mixing the coins from multiple users before distributing them to the desired output addresses. It follows a similar concept to Bitcoin mixers.

Usage

To use the Jobcoin Mixer, follow these steps:

1. Create an instance of the Mixer class.
2. Add users to the mixer using the addUser method, providing their wallet address and output addresses.
3. When a user wants to send Jobcoins to the mixer, call the transaction method, providing the sender's wallet address and the number of coins.
4. The mixer will transfer the coins to a pool address and increment the pool coins count.
5. The transactToOutputAddresses method can be called to distribute the mixed coins to the specified output addresses of each user.

Code Structure

The code consists of the following main components:

• Mixer: The main class representing the Jobcoin Mixer. It manages the mixer users, pool, transactions, and handles the mixing process.
• Transaction: A class representing a transaction with sender's wallet address, number of coins, and a flag indicating if the coins have been forwarded.
• MixerPool: A class representing the mixer pool with total coins and an address.
• MixerUser: A class representing a user of the mixer with their original address, output addresses, and output address allocation.

Next Steps

The current implementation provides a basic functionality for the Jobcoin Mixer. However, there are several considerations for further improvement:

• Implement the actual mechanisms for coin selection, shuffling, and output transaction generation.
• Add error handling and validation for various scenarios, such as missing addresses, insufficient funds, or incorrect allocations.
• Improve the efficiency and security of the mixer, considering privacy vulnerabilities and potential mitigation strategies.
• Enhance the user interface or API for interacting with the mixer.
• Consider implementing additional features like transaction fees, mixing strategies, or advanced privacy techniques.

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