7.2 Pre-computation Engine and Security Mechanisms

Pre-computation Engine: The Perfect Combination of Efficiency and Transparency

The Innovative Value of the Pre-computation Model

Utopia has adopted a unique pre-computation model where all order return amounts and yields are predetermined when the contract is deployed.

Technical Advantages of Pre-computation

• Gas Efficiency Optimization: Order processing requires no complex calculations, only simple table lookup operations
• Result Predictability: Users can know the exact return amount when creating orders
• System Stability: Eliminates calculation errors and integer overflow risks
• Audit Friendliness: All calculation results are pre-disclosed constants

Multiple Security Protection Mechanisms

Defense-in-Depth Security Architecture

Utopia has adopted a military-grade defense-in-depth security architecture:

First Layer: Input Validation Security

modifier validDimension(uint8 dimension) {
    require(dimension < 4, "Invalid dimension");
    _;
}
modifier validAmount(uint256 amount, uint8 dimension) {
    require(amount == dimensions[dimension].amount, "Invalid amount");
    _;
}

Second Layer: Business Logic Security

modifier oneOrderPerUser() {
    require(!hasActiveOrder[msg.sender], "User already has active order");
    _;
}
// ReentrancyGuard from OpenZeppelin
// modifier nonReentrant() { ... }

Third Layer: Fund Security Protection

using SafeERC20 for IERC20;
// token.safeTransfer(to, amount);

Security Guarantee Mechanism

/**
 * @dev Multiple security guarantees
 */
contract UtopiaCore is ReentrancyGuard {
    
    // Reentrancy attack protection
    modifier nonReentrant() {
        // OpenZeppelin ReentrancyGuard implementation
        _;
    }
    
    // Input validation
    modifier validDimension(uint8 dimension) {
        require(dimension < 4, "Invalid dimension");
        _;
    }
    
    // User status check
    modifier oneOrderPerUser() {
        require(!hasActiveOrder[msg.sender], "User already has active order");
        _;
    }
    
    // System status check
    modifier systemUnlocked() {
        require(block.timestamp >= systemUnlockTime, "System locked");
        _;
    }
}