WePower Energy Tokens: Green Energy Yield Strategies for Maximum Returns

// WePower Yield Farming Smart Contract Example
pragma solidity ^0.8.19;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

contract WePowerYieldFarm is ReentrancyGuard {
    IERC20 public wepowerToken;
    IERC20 public rewardToken;
    
    // Staking pool configuration
    struct Pool {
        uint256 totalStaked;
        uint256 rewardRate;      // Rewards per second
        uint256 lastUpdateTime;
        uint256 rewardPerTokenStored;
    }
    
    // User staking information
    struct UserInfo {
        uint256 stakedAmount;
        uint256 rewardDebt;
        uint256 pendingRewards;
    }
    
    mapping(address => UserInfo) public userInfo;
    Pool public stakingPool;
    
    event Staked(address indexed user, uint256 amount);
    event Withdrawn(address indexed user, uint256 amount);
    event RewardClaimed(address indexed user, uint256 reward);
    
    constructor(address _wepowerToken, address _rewardToken) {
        wepowerToken = IERC20(_wepowerToken);
        rewardToken = IERC20(_rewardToken);
        stakingPool.lastUpdateTime = block.timestamp;
        stakingPool.rewardRate = 100 * 10**18; // 100 tokens per second
    }
    
    // Calculate current reward per token
    function rewardPerToken() public view returns (uint256) {
        if (stakingPool.totalStaked == 0) {
            return stakingPool.rewardPerTokenStored;
        }
        
        uint256 timeElapsed = block.timestamp - stakingPool.lastUpdateTime;
        uint256 rewardIncrease = timeElapsed * stakingPool.rewardRate * 1e18 / stakingPool.totalStaked;
        
        return stakingPool.rewardPerTokenStored + rewardIncrease;
    }
    
    // Stake WePower tokens to earn rewards
    function stake(uint256 _amount) external nonReentrant {
        require(_amount > 0, "Cannot stake 0 tokens");
        
        updateReward(msg.sender);
        
        userInfo[msg.sender].stakedAmount += _amount;
        stakingPool.totalStaked += _amount;
        
        wepowerToken.transferFrom(msg.sender, address(this), _amount);
        
        emit Staked(msg.sender, _amount);
    }
    
    // Withdraw staked tokens and claim rewards
    function withdraw(uint256 _amount) external nonReentrant {
        require(_amount > 0, "Cannot withdraw 0 tokens");
        require(userInfo[msg.sender].stakedAmount >= _amount, "Insufficient staked amount");
        
        updateReward(msg.sender);
        
        userInfo[msg.sender].stakedAmount -= _amount;
        stakingPool.totalStaked -= _amount;
        
        wepowerToken.transfer(msg.sender, _amount);
        
        emit Withdrawn(msg.sender, _amount);
    }
    
    // Claim accumulated rewards
    function claimReward() external nonReentrant {
        updateReward(msg.sender);
        
        uint256 reward = userInfo[msg.sender].pendingRewards;
        require(reward > 0, "No rewards available");
        
        userInfo[msg.sender].pendingRewards = 0;
        rewardToken.transfer(msg.sender, reward);
        
        emit RewardClaimed(msg.sender, reward);
    }
    
    // Internal function to update user reward calculations
    function updateReward(address _user) internal {
        stakingPool.rewardPerTokenStored = rewardPerToken();
        stakingPool.lastUpdateTime = block.timestamp;
        
        if (_user != address(0)) {
            UserInfo storage user = userInfo[_user];
            user.pendingRewards = earned(_user);
            user.rewardDebt = stakingPool.rewardPerTokenStored;
        }
    }
    
    // Calculate earned rewards for a user
    function earned(address _user) public view returns (uint256) {
        UserInfo memory user = userInfo[_user];
        uint256 rewardPerTokenDiff = rewardPerToken() - user.rewardDebt;
        return user.stakedAmount * rewardPerTokenDiff / 1e18 + user.pendingRewards;
    }
}

// WePower Token Integration with Web3.js
const Web3 = require('web3');
const WePowerABI = require('./contracts/WePowerToken.json');

class WePowerIntegration {
    constructor(providerUrl, contractAddress, privateKey) {
        this.web3 = new Web3(providerUrl);
        this.account = this.web3.eth.accounts.privateKeyToAccount(privateKey);
        this.contract = new this.web3.eth.Contract(WePowerABI, contractAddress);
        
        // Add account to wallet for transactions
        this.web3.eth.accounts.wallet.add(this.account);
    }
    
    // Check token balance for specific address
    async getTokenBalance(address) {
        try {
            const balance = await this.contract.methods.balanceOf(address).call();
            return this.web3.utils.fromWei(balance, 'ether');
        } catch (error) {
            console.error('Error fetching balance:', error);
            throw error;
        }
    }
    
    // Stake tokens in yield farming contract
    async stakeTokens(amount, yieldFarmAddress) {
        const weiAmount = this.web3.utils.toWei(amount.toString(), 'ether');
        
        try {
            // First approve the yield farm contract to spend tokens
            const approvalTx = await this.contract.methods
                .approve(yieldFarmAddress, weiAmount)
                .send({ from: this.account.address, gas: 100000 });
            
            console.log('Approval transaction:', approvalTx.transactionHash);
            
            // Then stake the tokens
            const yieldFarmContract = new this.web3.eth.Contract(
                YieldFarmABI, 
                yieldFarmAddress
            );
            
            const stakeTx = await yieldFarmContract.methods
                .stake(weiAmount)
                .send({ from: this.account.address, gas: 200000 });
            
            console.log('Staking transaction:', stakeTx.transactionHash);
            return stakeTx;
            
        } catch (error) {
            console.error('Staking failed:', error);
            throw error;
        }
    }
    
    // Monitor energy production and token minting
    async monitorEnergyProduction() {
        // Listen for new token minting events
        this.contract.events.TokenMinted({
            fromBlock: 'latest'
        }, (error, event) => {
            if (error) {
                console.error('Event monitoring error:', error);
                return;
            }
            
            console.log('New energy tokens minted:', {
                producer: event.returnValues.producer,
                amount: this.web3.utils.fromWei(event.returnValues.amount, 'ether'),
                energySource: event.returnValues.energySource,
                timestamp: new Date(event.returnValues.timestamp * 1000)
            });
        });
    }
    
    // Calculate optimal yield strategy based on current market conditions
    async calculateOptimalYield() {
        const stakingAPY = await this.getStakingAPY();
        const liquidityAPY = await this.getLiquidityMiningAPY();
        const energyPrice = await this.getCurrentEnergyPrice();
        
        const strategies = [
            {
                name: 'Staking Only',
                apy: stakingAPY,
                risk: 'Low',
                liquidity: 'Locked'
            },
            {
                name: 'Liquidity Mining',
                apy: liquidityAPY,
                risk: 'Medium',
                liquidity: 'High'
            },
            {
                name: 'Mixed Strategy',
                apy: (stakingAPY * 0.6) + (liquidityAPY * 0.4),
                risk: 'Medium',
                liquidity: 'Medium'
            }
        ];
        
        // Sort by APY and return best strategy
        return strategies.sort((a, b) => b.apy - a.apy)[0];
    }
    
    // Get current staking APY from yield farm contract
    async getStakingAPY() {
        // Implementation depends on yield farm contract structure
        // This is a simplified example
        const rewardRate = await this.yieldFarmContract.methods.rewardRate().call();
        const totalStaked = await this.yieldFarmContract.methods.totalStaked().call();
        
        if (totalStaked == 0) return 0;
        
        // Calculate annual percentage yield
        const secondsPerYear = 365 * 24 * 60 * 60;
        const annualRewards = rewardRate * secondsPerYear;
        const apy = (annualRewards / totalStaked) * 100;
        
        return apy;
    }
}

// Usage example
const integration = new WePowerIntegration(
    'https://mainnet.infura.io/v3/YOUR-PROJECT-ID',
    '0x...', // WePower token contract address
    '0x...'  // Your private key
);

// Start monitoring and execute yield strategy
async function executeYieldStrategy() {
    try {
        const balance = await integration.getTokenBalance(integration.account.address);
        console.log('Current WePower balance:', balance);
        
        const optimalStrategy = await integration.calculateOptimalYield();
        console.log('Optimal yield strategy:', optimalStrategy);
        
        // Execute staking based on strategy
        if (optimalStrategy.name.includes('Staking')) {
            await integration.stakeTokens(balance * 0.5, YIELD_FARM_ADDRESS);
        }
        
        // Start monitoring energy production
        integration.monitorEnergyProduction();
        
    } catch (error) {
        console.error('Strategy execution failed:', error);
    }
}

# Python script for energy production data integration
import requests
import json
from web3 import Web3
import time

class EnergyOracle:
    def __init__(self, web3_provider, oracle_contract_address, api_key):
        self.web3 = Web3(Web3.HTTPProvider(web3_provider))
        self.oracle_address = oracle_contract_address
        self.api_key = api_key
        
    def fetch_energy_data(self, facility_id):
        """Fetch real-time energy production data from external API"""
        url = f"https://api.energymonitor.com/facilities/{facility_id}/production"
        headers = {
            'Authorization': f'Bearer {self.api_key}',
            'Content-Type': 'application/json'
        }
        
        try:
            response = requests.get(url, headers=headers)
            response.raise_for_status()
            return response.json()
        except requests.exceptions.RequestException as e:
            print(f"API request failed: {e}")
            return None
    
    def update_oracle_data(self, facility_id, energy_produced):
        """Update blockchain oracle with verified energy production data"""
        try:
            # Prepare transaction data
            function_data = self.oracle_contract.encodeABI(
                fn_name='updateEnergyProduction',
                args=[facility_id, energy_produced, int(time.time())]
            )
            
            # Send transaction to update oracle
            transaction = {
                'to': self.oracle_address,
                'data': function_data,
                'gas': 200000,
                'gasPrice': self.web3.toWei('20', 'gwei')
            }
            
            # Sign and send transaction
            signed_txn = self.web3.eth.account.sign_transaction(
                transaction, private_key=self.private_key
            )
            
            tx_hash = self.web3.eth.send_raw_transaction(signed_txn.rawTransaction)
            receipt = self.web3.eth.wait_for_transaction_receipt(tx_hash)
            
            return receipt.transactionHash.hex()
            
        except Exception as e:
            print(f"Oracle update failed: {e}")
            return None
    
    def verify_energy_production(self, facility_data):
        """Implement verification logic for energy production claims"""
        required_fields = ['facility_id', 'energy_produced', 'timestamp', 'meter_reading']
        
        # Validate data structure
        for field in required_fields:
            if field not in facility_data:
                return False, f"Missing required field: {field}"
        
        # Check production within reasonable limits
        max_hourly_production = facility_data.get('capacity', 0) * 1.1  # 110% of capacity
        if facility_data['energy_produced'] > max_hourly_production:
            return False, "Production exceeds facility capacity"
        
        # Verify timestamp is recent (within last hour)
        current_time = int(time.time())
        if current_time - facility_data['timestamp'] > 3600:
            return False, "Data timestamp too old"
        
        return True, "Verification successful"

# Example usage for automated oracle updates
oracle = EnergyOracle(
    web3_provider="https://mainnet.infura.io/v3/YOUR-PROJECT-ID",
    oracle_contract_address="0x...",
    api_key="your-energy-api-key"
)

def automated_oracle_update():
    """Automated function to update energy production data"""
    facility_ids = ['SOLAR_001', 'WIND_002', 'HYDRO_003']
    
    for facility_id in facility_ids:
        # Fetch latest energy data
        energy_data = oracle.fetch_energy_data(facility_id)
        
        if energy_data:
            # Verify data integrity
            is_valid, message = oracle.verify_energy_production(energy_data)
            
            if is_valid:
                # Update blockchain oracle
                tx_hash = oracle.update_oracle_data(
                    facility_id, 
                    energy_data['energy_produced']
                )
                print(f"Oracle updated for {facility_id}: {tx_hash}")
            else:
                print(f"Verification failed for {facility_id}: {message}")
        
        # Avoid API rate limiting
        time.sleep(10)

# Run oracle updates every hour
if __name__ == "__main__":
    while True:
        automated_oracle_update()
        time.sleep(3600)  # Wait 1 hour

// Gas-optimized batch operations for WePower tokens
contract OptimizedWePowerOperations {
    
    // Batch stake multiple amounts to save gas
    function batchStake(uint256[] calldata amounts, address[] calldata pools) external {
        require(amounts.length == pools.length, "Array length mismatch");
        
        uint256 totalAmount = 0;
        
        // Calculate total amount needed
        for (uint256 i = 0; i < amounts.length; i++) {
            totalAmount += amounts[i];
        }
        
        // Single transfer from user to contract
        wepowerToken.transferFrom(msg.sender, address(this), totalAmount);
        
        // Distribute to individual pools
        for (uint256 i = 0; i < amounts.length; i++) {
            IYieldFarm(pools[i]).stakeFor(msg.sender, amounts[i]);
        }
        
        emit BatchStakeCompleted(msg.sender, totalAmount, pools.length);
    }
    
    // Batch claim rewards from multiple pools
    function batchClaimRewards(address[] calldata pools) external returns (uint256 totalRewards) {
        for (uint256 i = 0; i < pools.length; i++) {
            uint256 reward = IYieldFarm(pools[i]).claimRewardFor(msg.sender);
            totalRewards += reward;
        }
        
        // Single transfer of all rewards
        if (totalRewards > 0) {
            rewardToken.transfer(msg.sender, totalRewards);
        }
        
        return totalRewards;
    }
}

// Real-time yield monitoring dashboard
class YieldMonitor {
    constructor(web3Provider, contracts) {
        this.web3 = new Web3(web3Provider);
        this.contracts = contracts;
        this.metrics = {
            totalStaked: 0,
            totalRewards: 0,
            averageAPY: 0,
            energyProduced: 0
        };
    }
    
    async updateMetrics() {
        const promises = this.contracts.map(async (contract) => {
            const [staked, rewards, apy] = await Promise.all([
                contract.methods.getTotalStaked().call(),
                contract.methods.getTotalRewards().call(),
                contract.methods.getCurrentAPY().call()
            ]);
            
            return { staked, rewards, apy };
        });
        
        const results = await Promise.all(promises);
        
        // Aggregate metrics across all contracts
        this.metrics.totalStaked = results.reduce((sum, r) => sum + parseInt(r.staked), 0);
        this.metrics.totalRewards = results.reduce((sum, r) => sum + parseInt(r.rewards), 0);
        this.metrics.averageAPY = results.reduce((sum, r) => sum + parseFloat(r.apy), 0) / results.length;
        
        // Emit metrics update event
        this.emit('metricsUpdated', this.metrics);
    }
    
    // Calculate portfolio performance metrics
    calculatePortfolioMetrics(userAddress) {
        return {
            totalValue: this.getUserTotalValue(userAddress),
            dailyYield: this.getDailyYield(userAddress),
            riskScore: this.calculateRiskScore(userAddress),
            diversificationIndex: this.getDiversificationIndex(userAddress)
        };
    }
    
    // Set up automated rebalancing based on performance metrics
    async autoRebalance(userAddress, thresholds) {
        const portfolio = await this.calculatePortfolioMetrics(userAddress);
        
        if (portfolio.riskScore > thresholds.maxRisk) {
            await this.rebalanceToLowerRisk(userAddress);
        }
        
        if (portfolio.diversificationIndex < thresholds.minDiversification) {
            await this.increaseDiversification(userAddress);
        }
    }
}