Square Block DeFi: How Fortune 500 Companies Actually Make Money While They Sleep

// Corporate Multi-Sig Wallet Implementation
pragma solidity ^0.8.19;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

contract CorporateYieldVault is AccessControl, ReentrancyGuard {
    bytes32 public constant TREASURER_ROLE = keccak256("TREASURER_ROLE");
    bytes32 public constant COMPLIANCE_ROLE = keccak256("COMPLIANCE_ROLE");
    
    struct YieldStrategy {
        address protocol;
        uint256 allocation;
        uint256 maxRisk;
        bool active;
    }
    
    mapping(uint256 => YieldStrategy) public strategies;
    uint256 public strategyCount;
    
    event FundsDeployed(uint256 strategyId, uint256 amount);
    event YieldHarvested(uint256 strategyId, uint256 yield);
    
    constructor() {
        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _grantRole(TREASURER_ROLE, msg.sender);
    }
    
    // Deploy funds to approved yield farming strategy
    function deployToStrategy(
        uint256 strategyId, 
        uint256 amount
    ) external onlyRole(TREASURER_ROLE) nonReentrant {
        require(strategies[strategyId].active, "Strategy inactive");
        require(amount <= strategies[strategyId].maxRisk, "Exceeds risk limit");
        
        // Implementation details for specific protocol integration
        _executeDeployment(strategyId, amount);
        
        emit FundsDeployed(strategyId, amount);
    }
    
    // Harvest yields and compound or withdraw
    function harvestYield(
        uint256 strategyId
    ) external onlyRole(TREASURER_ROLE) nonReentrant {
        uint256 yield = _calculateYield(strategyId);
        
        // Automated yield harvesting logic
        _harvestFromProtocol(strategyId);
        
        emit YieldHarvested(strategyId, yield);
    }
    
    function _executeDeployment(uint256 strategyId, uint256 amount) private {
        // Protocol-specific deployment logic
        // Includes safety checks and slippage protection
    }
    
    function _calculateYield(uint256 strategyId) private view returns (uint256) {
        // Yield calculation from protocol rewards
    }
    
    function _harvestFromProtocol(uint256 strategyId) private {
        // Protocol-specific harvesting implementation
    }
}

// Corporate Multi-Sig Setup Script
const { ethers } = require('ethers');

class CorporateMultiSig {
    constructor(signers, threshold) {
        this.signers = signers; // Array of signer addresses
        this.threshold = threshold; // Required signatures
        this.pendingTransactions = new Map();
    }
    
    async proposeYieldDeployment(protocolAddress, amount, strategyParams) {
        const transactionId = this.generateTransactionId();
        
        const proposal = {
            id: transactionId,
            type: 'YIELD_DEPLOYMENT',
            protocol: protocolAddress,
            amount: amount,
            parameters: strategyParams,
            signatures: [],
            timestamp: Date.now(),
            executed: false
        };
        
        this.pendingTransactions.set(transactionId, proposal);
        
        // Notify compliance and treasury teams
        await this.notifyStakeholders(proposal);
        
        return transactionId;
    }
    
    async signTransaction(transactionId, signerAddress, signature) {
        const transaction = this.pendingTransactions.get(transactionId);
        
        if (!transaction || transaction.executed) {
            throw new Error('Invalid or executed transaction');
        }
        
        // Verify signer authorization
        if (!this.signers.includes(signerAddress)) {
            throw new Error('Unauthorized signer');
        }
        
        transaction.signatures.push({
            signer: signerAddress,
            signature: signature,
            timestamp: Date.now()
        });
        
        // Execute if threshold reached
        if (transaction.signatures.length >= this.threshold) {
            await this.executeTransaction(transactionId);
        }
    }
    
    async executeTransaction(transactionId) {
        const transaction = this.pendingTransactions.get(transactionId);
        
        // Deploy to yield farming protocol
        const result = await this.deployToProtocol(
            transaction.protocol,
            transaction.amount,
            transaction.parameters
        );
        
        transaction.executed = true;
        transaction.executionResult = result;
        
        // Log for compliance audit trail
        await this.logExecution(transaction);
    }
}

# Corporate DeFi Strategy Configuration
class CorporateYieldStrategy:
    def __init__(self):
        self.approved_protocols = {
            'aave': {
                'risk_level': 'low',
                'max_allocation': 0.30,
                'expected_apy': 0.08,
                'audit_status': 'verified'
            },
            'compound': {
                'risk_level': 'low',
                'max_allocation': 0.25,
                'expected_apy': 0.06,
                'audit_status': 'verified'
            },
            'uniswap_v3': {
                'risk_level': 'medium',
                'max_allocation': 0.20,
                'expected_apy': 0.15,
                'audit_status': 'verified'
            }
        }
    
    def calculate_optimal_allocation(self, treasury_amount):
        """Calculate optimal fund allocation across protocols"""
        allocations = {}
        
        for protocol, config in self.approved_protocols.items():
            max_amount = treasury_amount * config['max_allocation']
            risk_adjusted_amount = max_amount * config['risk_level_multiplier']
            
            allocations[protocol] = min(max_amount, risk_adjusted_amount)
        
        return allocations
    
    def monitor_strategy_performance(self):
        """Daily performance monitoring and risk assessment"""
        performance_metrics = {}
        
        for protocol in self.approved_protocols:
            current_yield = self.get_protocol_apy(protocol)
            impermanent_loss = self.calculate_il_risk(protocol)
            liquidity_depth = self.check_protocol_liquidity(protocol)
            
            performance_metrics[protocol] = {
                'current_apy': current_yield,
                'il_risk': impermanent_loss,
                'liquidity': liquidity_depth,
                'risk_score': self.calculate_risk_score(protocol)
            }
        
        return performance_metrics

// Corporate DeFi Analytics Dashboard
interface YieldFarmingMetrics {
    totalValueLocked: number;
    currentApy: number;
    realizedYield: number;
    impermanentLoss: number;
    riskScore: number;
    lastHarvest: Date;
}

class CorporateDeFiDashboard {
    private strategies: Map<string, YieldFarmingMetrics> = new Map();
    
    async generateComplianceReport(): Promise<ComplianceReport> {
        const totalTvl = Array.from(this.strategies.values())
            .reduce((sum, strategy) => sum + strategy.totalValueLocked, 0);
        
        const weightedApy = this.calculateWeightedApy();
        const aggregateRisk = this.calculateAggregateRisk();
        
        return {
            reportDate: new Date(),
            totalValueLocked: totalTvl,
            portfolioApy: weightedApy,
            riskMetrics: aggregateRisk,
            performanceVsBenchmark: this.compareToBenchmark(),
            regulatoryCompliance: await this.checkCompliance()
        };
    }
    
    private calculateWeightedApy(): number {
        let totalValue = 0;
        let weightedYield = 0;
        
        this.strategies.forEach(strategy => {
            totalValue += strategy.totalValueLocked;
            weightedYield += strategy.currentApy * strategy.totalValueLocked;
        });
        
        return totalValue > 0 ? weightedYield / totalValue : 0;
    }
}

-- Corporate DeFi Transaction Logging Schema
CREATE TABLE defi_transactions (
    id SERIAL PRIMARY KEY,
    transaction_hash VARCHAR(66) NOT NULL,
    protocol_address VARCHAR(42) NOT NULL,
    action_type VARCHAR(20) NOT NULL, -- 'deposit', 'withdraw', 'harvest'
    amount_usd DECIMAL(18,2) NOT NULL,
    gas_fee_usd DECIMAL(10,2) NOT NULL,
    yield_earned_usd DECIMAL(18,2),
    impermanent_loss_usd DECIMAL(18,2),
    approving_signatures TEXT[], -- Multi-sig approvals
    compliance_approval_id VARCHAR(50),
    executed_at TIMESTAMP NOT NULL,
    created_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX idx_defi_tx_protocol ON defi_transactions(protocol_address);
CREATE INDEX idx_defi_tx_date ON defi_transactions(executed_at);

# Automated Yield Optimization Algorithm
class YieldOptimizer:
    def __init__(self, protocols, rebalance_threshold=0.02):
        self.protocols = protocols
        self.rebalance_threshold = rebalance_threshold  # 2% yield difference
        
    def should_rebalance(self):
        """Check if rebalancing would improve returns"""
        current_yields = self.get_current_yields()
        max_yield = max(current_yields.values())
        
        for protocol, allocation in self.current_allocations.items():
            if allocation > 0:
                yield_diff = max_yield - current_yields[protocol]
                if yield_diff > self.rebalance_threshold:
                    return True, protocol, max_yield
        
        return False, None, None
    
    async def execute_rebalance(self, from_protocol, to_protocol, amount):
        """Execute automated rebalancing between protocols"""
        # 1. Withdraw from underperforming protocol
        withdrawal_tx = await self.withdraw_from_protocol(from_protocol, amount)
        
        # 2. Wait for transaction confirmation
        await self.wait_for_confirmation(withdrawal_tx)
        
        # 3. Deploy to higher-yielding protocol
        deployment_tx = await self.deploy_to_protocol(to_protocol, amount)
        
        # 4. Log rebalancing action for compliance
        await self.log_rebalancing_action(from_protocol, to_protocol, amount)