NFT Collateralized Lending Platform - Diamond Standard Implementation

A decentralized NFT-collateralized lending platform implemented using the Diamond Pattern (EIP-2535). This platform enables users to deposit NFTs as collateral to borrow ETH, with fixed-term loans and interest rates.

Overview

This platform provides a secure and efficient way to use NFTs as collateral for ETH loans. Built using the Diamond Pattern, it offers modular functionality and upgradeability while maintaining high security standards.

Key Features

• NFT collateralization
• Fixed-term loans
• Configurable interest rates
• Automated liquidation process
• Whitelisted NFT collections
• Emergency pause functionality
• Platform fee management
• Treasury management

Architecture

The platform is built using the Diamond Pattern (EIP-2535) and consists of the following main components:

Facets

1. NFT Management Facet

   • NFT deposits and withdrawals
   • Ownership tracking
   • Collection management

2. Lending Facet

   • Loan creation and management
   • Interest calculation
   • Repayment processing
   • Default handling

3. Collateral Manager Facet

   • Price feed management
   • Collateral ratio enforcement
   • Liquidation process
   • Value calculations

4. Treasury Facet

   • ETH deposits and withdrawals
   • Platform fee collection
   • Revenue distribution
   • Balance tracking

5. Admin Facet

   • Platform parameter management
   • Emergency controls
   • Collection whitelisting
   • Fee configuration

Libraries

• LibStorage.sol: Central storage management
• LibNFTLending.sol: Core lending logic
• LibSecurity.sol: Security and access control

Technical Specifications

• Solidity version: ^0.8.0
• Framework: Foundry
• Pattern: Diamond Standard (EIP-2535)

Key Design Patterns Used

• Diamond Pattern (EIP-2535)
• Facet Pattern
• Storage Pattern
• Access Control Pattern
• Emergency Stop Pattern
• Event-Emission Pattern
• Guard Pattern

Installation

1. Clone the repository:

git clone https://github.com/DonGuillotine/NFT-Collateralized-lending-platform.git
cd NFT-Collateralized-lending-platform

2. Install dependencies:

forge install

3. Compile contracts:

forge build

4. Run tests:

forge test

Usage

Deploying the Platform

1. Deploy the Diamond contract:

forge script scripts/deploy.s.sol:DeployScript --rpc-url <your_rpc_url> --private-key <your_private_key>

2. Initialize the platform with default parameters:

forge script scripts/initialize.s.sol:InitializeScript --rpc-url <your_rpc_url> --private-key <your_private_key>

For Borrowers

1. Deposit NFT:

INFTManagement(diamondAddress).depositNFT(collection, tokenId);

2. Create loan:

ILending(diamondAddress).createLoan(collection, tokenId, amount);

3. Repay loan:

ILending(diamondAddress).repayLoan(loanId);

For Lenders

1. Deposit ETH:

ITreasury(diamondAddress).depositETH{value: amount}();

2. Withdraw ETH:

ITreasury(diamondAddress).withdrawETH(amount);

Testing

The platform includes comprehensive tests for all components:

# Run all tests
forge test

# Run specific test file
forge test --match-path test/LendingFacetTest.t.sol

# Run tests with gas reporting
forge test --gas-report

All Tests Passed for NFTManagementFacet

All Tests Passed for CollateralManagerFacet

All Tests Passed for LendingFacet

All Tests Passed for TreasuryFacet

All Tests Passed for AdminFacet

Security Considerations

• All functions include proper access control
• Reentrancy protection on ETH transfers
• Parameter validation and bounds checking
• Emergency pause functionality
• Secure NFT handling
• Protected admin functions

Platform Parameters

Default parameters (configurable by admin):

• Interest Rate: 10% (1000)
• Collateral Ratio: 150% (15000)
• Loan Duration: 7 days
• Platform Fee: 1% (100)
• Minimum Deposit: 0.1 ETH

Future Improvements

• Multi-token support
• Variable interest rates
• NFT basket loans
• Secondary market for loans
• Integration with NFT price oracles
• Enhanced liquidation mechanisms
• Governance implementation

Contributing

1. Fork the repository
2. Create your feature branch
3. Commit your changes
4. Push to the branch
5. Create a new Pull Request

License

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

Acknowledgments

• Based on the Foundry-Hardhat-Diamonds template
• Implements EIP-2535 Diamond Standard

Support

For support, please open an issue in the repository or contact the development team.

Disclaimer

This software is provided "as is", without warranty of any kind. Use at your own risk.