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const logger = require('../utils/logger');
const redis = require('../config/redis');
const EventEmitter = require('events');
class TradingEngine extends EventEmitter {
constructor() {
super();
this.providers = {};
this.contracts = {};
this.isRunning = false;
this.strategies = new Map();
}
async initialize() {
try {
logger.info('Initializing Trading Engine...');
// Setup blockchain providers
await this.setupProviders();
// Load smart contracts
await this.loadContracts();
// Initialize strategies
await this.initializeStrategies();
// Start monitoring
this.startMonitoring();
this.isRunning = true;
logger.info('Trading Engine initialized successfully');
this.emit('initialized');
} catch (error) {
logger.error('Failed to initialize Trading Engine:', error);
throw error;
}
}
async setupProviders() {
const chains = {
ethereum: process.env.ETHEREUM_RPC_URL,
bsc: process.env.BSC_RPC_URL,
polygon: process.env.POLYGON_RPC_URL,
arbitrum: process.env.ARBITRUM_RPC_URL
};
for (const [chain, rpcUrl] of Object.entries(chains)) {
if (rpcUrl) {
this.providers[chain] = new ethers.providers.JsonRpcProvider(rpcUrl);
logger.info(`Provider setup for ${chain}`);
}
}
}
async loadContracts() {
// Load contract ABIs and addresses
const TradingVaultABI = require('../contracts/TradingVault.json');
const FlashArbitrageABI = require('../contracts/FlashArbitrage.json');
const MEVBotABI = require('../contracts/MEVBot.json');
const wallet = new ethers.Wallet(
process.env.BOT_PRIVATE_KEY,
this.providers.ethereum
);
this.contracts.tradingVault = new ethers.Contract(
process.env.TRADING_VAULT_ADDRESS,
TradingVaultABI,
wallet
);
this.contracts.flashArbitrage = new ethers.Contract(
process.env.FLASH_ARBITRAGE_ADDRESS,
FlashArbitrageABI,
wallet
);
this.contracts.mevBot = new ethers.Contract(
process.env.MEV_BOT_ADDRESS,
MEVBotABI,
wallet
);
logger.info('Contracts loaded successfully');
}
async initializeStrategies() {
const ArbitrageStrategy = require('../strategies/ArbitrageStrategy');
const FlashLoanStrategy = require('../strategies/FlashLoanStrategy');
const MEVStrategy = require('../strategies/MEVStrategy');
const AutoTradingStrategy = require('../strategies/AutoTradingStrategy');
this.strategies.set('arbitrage', new ArbitrageStrategy(this));
this.strategies.set('flashloan', new FlashLoanStrategy(this));
this.strategies.set('mev', new MEVStrategy(this));
this.strategies.set('autotrading', new AutoTradingStrategy(this));
logger.info(`Initialized ${this.strategies.size} trading strategies`);
}
startMonitoring() {
// Monitor for arbitrage opportunities
setInterval(() => {
if (this.isRunning) {
this.strategies.get('arbitrage')?.scan();
}
}, 5000); // Every 5 seconds
// Monitor for flash loan opportunities
setInterval(() => {
if (this.isRunning) {
this.strategies.get('flashloan')?.scan();
}
}, 10000); // Every 10 seconds
// Monitor for MEV opportunities
setInterval(() => {
if (this.isRunning) {
this.strategies.get('mev')?.scan();
}
}, 2000); // Every 2 seconds (faster for MEV)
// Monitor auto-trading signals
setInterval(() => {
if (this.isRunning) {
this.strategies.get('autotrading')?.analyze();
}
}, 60000); // Every minute
logger.info('Started monitoring for trading opportunities');
}
async executeTrade(userId, strategyType, params) {
try {
const strategy = this.strategies.get(strategyType);
if (!strategy) {
throw new Error(`Strategy ${strategyType} not found`);
}
logger.info(`Executing ${strategyType} trade for user ${userId}`);
const result = await strategy.execute(userId, params);
// Store result in Redis for quick access
await redis.set(
`trade:${result.transactionHash}`,
JSON.stringify(result),
{ EX: 3600 } // Expire after 1 hour
);
this.emit('tradeExecuted', { userId, strategyType, result });
return result;
} catch (error) {
logger.error(`Failed to execute trade: ${error.message}`);
throw error;
}
}
async getPortfolioValue(userId) {
try {
// Get user's portfolio from contract
const portfolio = await this.contracts.tradingVault.getPortfolio(userId);
return {
totalDeposited: ethers.utils.formatEther(portfolio.totalDeposited),
currentValue: ethers.utils.formatEther(portfolio.currentValue),
totalProfits: ethers.utils.formatEther(portfolio.totalProfits),
totalFeesPaid: ethers.utils.formatEther(portfolio.totalFeesPaid)
};
} catch (error) {
logger.error(`Failed to get portfolio value: ${error.message}`);
throw error;
}
}
async getGasPrice(chain = 'ethereum') {
try {
const provider = this.providers[chain];
const gasPrice = await provider.getGasPrice();
return ethers.utils.formatUnits(gasPrice, 'gwei');
} catch (error) {
logger.error(`Failed to get gas price: ${error.message}`);
return null;
}
}
async estimateProfit(strategyType, params) {
try {
const strategy = this.strategies.get(strategyType);
if (!strategy) {
throw new Error(`Strategy ${strategyType} not found`);
}
return await strategy.estimateProfit(params);
} catch (error) {
logger.error(`Failed to estimate profit: ${error.message}`);
throw error;
}
}
stop() {
this.isRunning = false;
logger.info('Trading Engine stopped');
this.emit('stopped');
}
getStatus() {
return {
isRunning: this.isRunning,
connectedChains: Object.keys(this.providers),
activeStrategies: Array.from(this.strategies.keys()),
contractsLoaded: Object.keys(this.contracts).length
};
}
}
module.exports = TradingEngine;
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