NolaSwap - Compliant DEX Built on Uniswap v4

NolaSwap is a decentralized exchange (DEX) built on Uniswap v4, focusing on regulatory compliance while maintaining decentralization and privacy. This implementation includes advanced features for KYC/AML, automated tax collection, and MEV protection.

Technical Architecture

Core Contracts

1. KYCContract.sol

   • Manages KYC verification and volume restrictions
   • Implements tiered trading limits based on KYC level
   • Uses Chainlink price feeds for volume calculations
   • Features:
     • Volume-based KYC requirements
     • Token and user restriction capabilities
     • Configurable trading limits for swaps and liquidity operations

2. MainHook.sol

   • Core hook implementation for Uniswap v4
   • Handles swap validation and liquidity management
   • Integrates with KYC and Tax contracts
   • Key features:
     • Pre-swap validation
     • Liquidity position management
     • MEV protection mechanisms

3. TaxContract.sol

   • Manages automated tax collection
   • Configurable tax rates and whitelisting
   • Transparent on-chain tax storage
   • Features:
     • Automated 0.1% tax collection
     • Whitelist management
     • Tax withdrawal mechanisms
     • Support for both ERC20 and native currency

4. MEVArbitrage.sol

   • Implements MEV protection mechanisms
   • Features:
     • Price commitment mechanism
     • Liquidity rebalancing
     • Arbitrage control
     • Protection against sandwich attacks

Key Technical Features

Identity Verification

• SoulBound Token (SBT) based identity verification
• Three-tier KYC system with different trading limits
• Privacy-preserving verification mechanism

Trading Protection

function isPermitKYCSwap(uint256 amount, address token) public view returns (bool)
function isPermitKYCModifyLiquidity(uint256 amount0, address token0, uint256 amount1, address token1) public view returns (bool)

• Volume-based trading restrictions
• Smart anti-money laundering checks
• Real-time price feed integration

Tax Management

function calculateTax(uint256 amount) external view returns (uint256)
function withdrawERC20(address token, uint256 amount) external

• Automated tax collection system
• Transparent tax storage
• Configurable tax rates
• Support for multiple tokens

MEV Protection

function openPool(uint160 _newSqrtPriceX96) external
function depositHedgeCommitment(uint256 amount0, uint256 amount1) external payable

• Price commitment mechanism
• Liquidity provider protection
• Anti-sandwich attack measures
• Fair ordering system

Technical Requirements

• Solidity ^0.8.24
• Uniswap v4 Core
• OpenZeppelin Contracts
• Chainlink Price Feeds

Development Setup

1. Clone the repository

git clone https://github.com/your-repo/nolaswap.git

2. Install dependencies

forge install

3. Compile contracts

forge build

4. Run tests

forge test

Security Considerations

1. Access Control

   • Ownable pattern for administrative functions
   • Role-based access control for sensitive operations
   • Whitelisting mechanism for privileged operations

2. Price Oracle Security

   • Chainlink price feed integration
   • Fallback mechanisms for oracle failures
   • Price manipulation protection

3. Smart Contract Safety

   • Reentrancy protection
   • Integer overflow protection (Solidity ^0.8.x)
   • Emergency pause functionality

License

MIT License

Contributing

Please read CONTRIBUTING.md for details on our code of conduct and the process for submitting pull requests.

Audits

[Pending - Security audits will be conducted before mainnet deployment]