Subz Smart Contracts

[](https://opensource.org/licenses/MIT) [](https://lukso.network) [](https://docs.soliditylang.org/)

Overview

This repository contains the smart contracts for Subz, a decentralized subscription management platform built on LUKSO. The contracts enable creators to deploy their own subscription services with NFT-powered benefits using LSP7 Digital Asset standard.

Architecture

Factory Contract

The Factory contract is responsible for deploying individual subscription contracts for creators. It:

• Manages deployment of new subscription contracts
• Maintains registry of deployed contracts
• Handles platform fee collection (2%)
• Enforces standardization across deployments

Subscription Contract

Each subscription contract is an LSP7-compliant token that:

• Manages subscription logic and payments
• Handles subscriber permissions via authorizeOperator
• Processes fixed monthly charges
• Mints NFTs representing active subscriptions
• Enforces immutable pricing

Key Features

Secure Payment Model

• Fixed-price immutable subscriptions
• Limited operator permissions
• No unlimited allowances
• Automated compliance checks

LSP Integration

• LSP7 Digital Asset standard
• Universal Profile compatibility
• Future support for LSP1 (batch transactions)

Technical Implementation

Subscription Flow

1. Contract Deployment

function createSubscription(
    string memory name,
    address recipient,
    address stablecoin
) external returns (address);

2. Subscription Authorization

function authorizeOperator(
    address operator,
    uint256 amount
) external;

3. Payment Processing

function _chargeSubscriber(
    address subscriber
) internal returns (bool);

Security Measures

• Fixed Price Protection

modifier onlyFixedPrice() {
    require(msg.value == subscriptionPrice, "Invalid payment amount");
    _;
}

• Operator Limitations

modifier onlyAuthorizedAmount(uint256 amount) {
    require(amount == subscriptionPrice, "Invalid operator amount");
    _;
}

Future Improvements

1. Enhanced LSP Integration

   • Native LYX payment support via TRANSFER VALUE
   • Improved LSP4 metadata for subscription tiers
   • LSP1 batch transaction support

2. Multiple Tiers

   • Tiered subscription levels
   • Unique NFTs per tier
   • Dynamic pricing models

3. Advanced Features

   • Content gating mechanisms
   • Loyalty rewards
   • Automated airdrops

Security

This project is in beta. Use at your own risk.

Known Limitations

• Fixed price model
• Single token support per contract
• Manual renewal triggers

Contributing

1. Fork the repository
2. Create feature branch
3. Commit changes
4. Push to branch
5. Open pull request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contact

• Discord: Join our community
• Twitter: @SubzApp