Crypto Whale Tracker

class WhaleTracker {
    constructor() {
        // Connect to Ethereum mainnet via Infura
        this.provider = new ethers.JsonRpcProvider(
            `https://mainnet.infura.io/v3/${process.env.INFURA_API_KEY}`
        );

        this.whaleThreshold = process.env.WHALE_THRESHOLD || 100; // ETH
        this.stats = {
            blocksScanned: 0,
            whalesDetected: 0,
            totalVolume: 0,
            startTime: new Date()
        };
    }

    // Check if transaction is whale-sized
    isWhaleTransaction(valueWei) {
        const valueEth = parseFloat(ethers.formatEther(valueWei));
        return valueEth >= this.whaleThreshold;
    }

    // Display whale alert
    displayWhale(tx, valueEth) {
        console.log('\n' + '='.repeat(70));
        console.log('🐋 WHALE DETECTED!');
        console.log('='.repeat(70));
        console.log(`💰 Amount: ${valueEth.toFixed(4)} ETH`);
        console.log(`📤 From:   ${tx.from || 'N/A'}`);
        console.log(`📥 To:     ${tx.to || 'N/A'}`);
        console.log(`🔗 Hash:   ${tx.hash}`);
        console.log('='.repeat(70) + '\n');

        this.stats.whalesDetected++;
        this.stats.totalVolume += valueEth;
    }

    // Main monitoring function with WebSocket events
    async start() {
        this.log('🔍 Starting Crypto Whale Tracker...');
        this.log('⏱️  Ethereum block time: ~12 seconds');

        // Listen for new blocks
        this.provider.on('block', async (blockNumber) => {
            this.log(`📦 Scanning block #${blockNumber}...`);
            this.stats.blocksScanned++;

            const block = await this.provider.getBlock(blockNumber, true);

            if (block && block.transactions) {
                for (const tx of block.transactions) {
                    if (tx.value && this.isWhaleTransaction(tx.value)) {
                        const valueEth = parseFloat(ethers.formatEther(tx.value));
                        this.displayWhale(tx, valueEth);
                    }
                }
            }
        });
    }
}

# Clone repository
git clone https://github.com/rahulkhunte/crypto-whale-tracker.git
cd crypto-whale-tracker

# Install dependencies
npm install

# Configure environment
# Create .env file with:
# INFURA_API_KEY=your_infura_api_key
# WHALE_THRESHOLD=100

# Run the tracker
node index.js