Yield Farming & Harvesting

// Yield Farming Optimization Algorithm
class YieldFarmingOptimizer {
    async optimizePositions(portfolio) {
        // 1. Scan all available protocols
        const availablePools = await this.scanProtocols();
        
        // 2. Calculate expected returns for each pool
        const poolAnalysis = await Promise.all(
            availablePools.map(pool => this.analyzePool(pool))
        );
        
        // 3. Apply risk scoring
        const scoredPools = poolAnalysis.map(pool => ({
            ...pool,
            riskScore: this.calculateRiskScore(pool),
            riskAdjustedReturn: pool.apr / pool.riskScore
        }));
        
        // 4. Optimize allocation using Modern Portfolio Theory
        const optimalAllocation = this.optimizeAllocation(scoredPools);
        
        // 5. Execute rebalancing if needed
        const rebalancingNeeded = this.assessRebalancing(portfolio, optimalAllocation);
        
        if (rebalancingNeeded) {
            await this.executeRebalancing(portfolio, optimalAllocation);
        }
        
        return optimalAllocation;
    }
    
    async analyzePool(pool) {
        const [
            apr,
            tvl,
            impermanentLoss,
            protocolRisk,
            liquidityDepth
        ] = await Promise.all([
            this.getPoolAPR(pool),
            this.getPoolTVL(pool),
            this.estimateImpermanentLoss(pool),
            this.assessProtocolRisk(pool.protocol),
            this.getLiquidityDepth(pool)
        ]);
        
        return {
            ...pool,
            apr,
            tvl,
            impermanentLoss,
            protocolRisk,
            liquidityDepth,
            overallScore: this.calculateOverallScore({
                apr, tvl, impermanentLoss, protocolRisk, liquidityDepth
            })
        };
    }
}

// Automated Harvesting System
class AutomatedHarvester {
    constructor(config) {
        this.config = config;
        this.lastHarvest = new Map();
    }
    
    async shouldHarvest(position) {
        const pendingRewards = await this.getPendingRewards(position);
        const gasEstimate = await this.estimateHarvestGas(position);
        const gasPrice = await this.getCurrentGasPrice();
        
        const harvestCost = gasEstimate * gasPrice;
        const expectedValue = pendingRewards.totalValue;
        
        // Check if harvest is profitable
        if (expectedValue <= harvestCost) {
            return { shouldHarvest: false, reason: 'Cost exceeds value' };
        }
        
        // Check minimum harvest threshold
        if (expectedValue < this.config.minHarvestValue) {
            return { shouldHarvest: false, reason: 'Below minimum threshold' };
        }
        
        // Check compound interest benefits
        const compoundBenefit = this.calculateCompoundBenefit(position, pendingRewards);
        const totalBenefit = expectedValue + compoundBenefit;
        
        return {
            shouldHarvest: totalBenefit > harvestCost,
            expectedValue: totalBenefit,
            harvestCost,
            compoundBenefit
        };
    }
    
    async batchHarvest(positions) {
        const harvestablePositions = [];
        
        // Check each position
        for (const position of positions) {
            const shouldHarvest = await this.shouldHarvest(position);
            if (shouldHarvest.shouldHarvest) {
                harvestablePositions.push({
                    position,
                    ...shouldHarvest
                });
            }
        }
        
        if (harvestablePositions.length === 0) {
            return { harvested: false, reason: 'No profitable positions' };
        }
        
        // Sort by expected value/harvest cost ratio
        harvestablePositions.sort((a, b) => 
            (b.expectedValue / b.harvestCost) - (a.expectedValue / a.harvestCost)
        );
        
        // Execute batch harvest
        const results = await this.executeBatchHarvest(harvestablePositions);
        return { harvested: true, results };
    }
}

// Compound Interest Optimization
class CompoundOptimizer {
    async calculateOptimalFrequency(position) {
        const [
            dailyReward,
            gasPrice,
            gasEstimate,
            timeInPosition
        ] = await Promise.all([
            this.getDailyRewardRate(position),
            this.getAverageGasPrice(),
            this.estimateCompoundGas(position),
            this.getTimeInPosition(position)
        ]);
        
        // Calculate compound frequencies
        const frequencies = {
            daily: this.calculateCompoundGrowth(dailyReward, 365, timeInPosition),
            weekly: this.calculateCompoundGrowth(dailyReward * 7, 52, timeInPosition),
            monthly: this.calculateCompoundGrowth(dailyReward * 30, 12, timeInPosition)
        };
        
        // Calculate gas costs for each frequency
        const gasCosts = {
            daily: gasEstimate * gasPrice * 365,
            weekly: gasEstimate * gasPrice * 52,
            monthly: gasEstimate * gasPrice * 12
        };
        
        // Calculate net returns
        const netReturns = Object.entries(frequencies).map(([freq, growth]) => ({
            frequency: freq,
            grossReturn: growth,
            gasCost: gasCosts[freq],
            netReturn: growth - gasCosts[freq]
        }));
        
        // Return optimal frequency
        return netReturns.reduce((best, current) => 
            current.netReturn > best.netReturn ? current : best
        );
    }
    
    calculateCompoundGrowth(rate, frequency, timeYears) {
        // A = P(1 + r/n)^(nt)
        return Math.pow(1 + rate / frequency, frequency * timeYears);
    }
}

// Initialize Yield Farming Strategy
const yieldStrategy = new PoIPoEYield({
    apiKey: 'your-api-key',
    network: 'ethereum',
    riskProfile: 'moderate',
    protocols: ['uniswap', 'compound', 'yearn'],
    compoundFrequency: 'weekly',
    minYieldThreshold: 0.08 // 8% APY minimum
});

// Configure strategy parameters
yieldStrategy.configure({
    maxProtocolAllocation: 0.25,      // Max 25% per protocol
    rebalanceThreshold: 0.05,         // 5% deviation trigger
    harvestGasLimit: 500000,          // Gas limit for harvesting
    emergencyExitTrigger: 0.15        // 15% drawdown trigger
});

// Start yield optimization
yieldStrategy.startOptimization({
    onRebalance: (action) => {
        console.log('Rebalancing recommended:', action);
    },
    onHarvest: (results) => {
        console.log('Harvest completed:', results);
    },
    onAlert: (alert) => {
        console.log('Risk alert:', alert);
    }
});

// Get current positions
const positions = await yieldStrategy.getPositions();
console.log('Current yield positions:', positions);