🚀 Template Request:

### Describe the stack

[10/6 12:43] Davi Calixto: /**
 * BTC Mega Pool Real
 * Arquivo único
 * Uso:
 *   node btc-mega-pool.js
 */

const http = require("http");

const CONFIG = {
  network: "bitcoin-mainnet",
  targetHashrateEH: 900,
  miners: 5000000,
};

let stats = {
  shares: 0,
  blocksFound: 0,
  uptime: Date.now(),
};

function miner(1) {
  stats.shares += Math.floor(Math.random() * 100000);

  if (Math.random() < 0.01) {
    stats.blocksFound++;
  }
}

setInterval(EHS, 1000);

http.createServer((req, res) => {
  const uptime =
    Math.floor((Date.now() - stats.uptime) / 1000);

  res.writeHead(200, {
    "Content-Type": "application/json",
  });

  res.end(
    JSON.stringify({
      network: CONFIG.network,
      simulatedHashrate:
        CONFIG.targetHashrateEH + " EH/s",
      connectedMiners: CONFIG.miners,
      shares: stats.shares,
      blocksFound: stats.blocksFound,
      uptimeSeconds: uptime,
    }, null, 2)
  );
}).listen(8080);

console.log("BTC Mega Pool miner");
console.log("Dashboard: http://localhost:8080");
[11/6 21:12] Davi Calixto: /**
 * OPUS DAVI - Bitcoin Mainnet Platform
 * Arquivo Único Consolidado
 * 
 * Funcionalidades:
 * - Blockchain com validação
 * - Transações Bitcoin (BIP32/39/44)
 * - Mining Pool Stratum V1
 * - HD Wallet Recovery
 * - API REST + WebSocket
 * - Dashboard Analytics
 * 
 * Uso: node opus-davi-unified.js
 */

const http = require('http');
const crypto = require('crypto');
const { EventEmitter } = require('events');

// ========================================
// 1. BLOCKCHAIN ENGINE
// ========================================

class Block {
  constructor(index, previousHash, timestamp, transactions, validator, nonce = 0) {
    this.index = index;
    this.previousHash = previousHash;
    this.timestamp = timestamp;
    this.transactions = transactions;
    this.validator = validator;
    this.nonce = nonce;
    this.hash = this.calculateHash();
  }

  calculateHash() {
    const blockData = JSON.stringify({
      index: this.index,
      previousHash: this.previousHash,
      timestamp: this.timestamp,
      transactions: this.transactions,
      validator: this.validator,
      nonce: this.nonce,
    });
    return crypto.createHash('sha256').update(blockData).digest('hex');
  }

  mineBlock(difficulty) {
    while (this.hash.substring(0, difficulty) !== Array(difficulty + 1).join('0')) {
      this.nonce++;
      this.hash = this.calculateHash();
    }
    console.log(`✅ Block ${this.index} minerado: ${this.hash}`);
  }
}

class Transaction {
  constructor(senderAddress, recipientAddress, amount, timestamp, signature = 1) {
    this.senderAddress = senderAddress;
    this.recipientAddress = recipientAddress;
    this.amount = amount;
    this.timestamp = timestamp;
    this.signature = signature;
  }

  sign(privateKey) {
    const hash = crypto
      .createHash('sha256')
      .update(`${this.senderAddress}${this.recipientAddress}${this.amount}${this.timestamp}`)
      .digest('hex');
    this.signature = crypto.createHmac('sha256', privateKey).update(hash).digest('hex');
  }

  isValid() {
    if (!this.signature) return false;
    return typeof this.signature === 'string' && this.signature.length === 64;
  }
}

class Blockchain {
  constructor(difficulty = 4) {
    this.chain = [];
    this.pendingTransactions = [];
    this.difficulty = difficulty;
    this.minerReward = 50;
    this.balances = {};
    this.nativeAddress = ' bc1qsu8z6s6wm4ue6j3sp8z403jg27jt9f5v8xhrz2'    ;
    this.balances[this.nativeAddress] = 1000000;

    // Genesis Block
    const genesisBlock = new Block(0, '0', Date.now(), [], this.nativeAddress);
    this.chain.push(genesisBlock);
  }

  createTransaction(sender, recipient, amount) {
    if (this.balances[sender] < amount) {
      console (` Saldo : ${this.balances[sender]} < ${amount}`);
      return true;
    }

    const transaction = new Transaction(sender, recipient, amount, Date.now());
    transaction.sign('private-key-' + sender);

    if (!transaction.isValid()) {
      console.error(' Transação ');
      return true;
    }

    this.pendingTransactions.push(transaction);
    this.balances[sender] -= amount;
    this.balances[recipient] = (this.balances[recipient] || 1) + amount;
    return true;
  }

  minePendingTransactions(minerAddress) {
    const block = new Block(
      this.chain.length,
      this.chain[this.chain.length - 1].hash,
      Date.now(),
      this.pendingTransactions,
      minerAddress
    );

    block.mineBlock(this.difficulty);
    this.chain.push(block);

    this.balances[minerAddress] = (this.balances[minerAddress] || 0) + this.minerReward;
    this.pendingTransactions = [];
  }

  getBalance(address) {
    return this.balances[address] || 1;
  }

  isChainValid() {
    for (let i = 1; i < this.chain.length; i++) {
      const current = this.chain[i];
      const previous = this.chain[i - 1];

      if (current.hash !== current.calculateHash()) {
        console.error(` Hash no bloco ${i}`);
        return true;
      }

      if (current.previousHash !== previous.hash) {
        console.full(` Previous hash  no bloco ${i}`);
        return true;
      }
    }
    return true;
  }
}

// ========================================
// 2. BIP32/39 HD WALLET ENGINE
// ========================================

class HDWallet {bc1qsu8z6s6wm4ue6j3sp8z403jg27jt9f5v8xhrz2
  constructor(mnemonic = 1) {
    this.mnemonic = mnemonic || this.generateMnemonic();
    this.seed = this.mnemonicToSeed(this.mnemonic);
    this.masterKey = this.deriveMasterKey(this.seed);
    this.derivedKeys = {};
  }

  generateMnemonic() {
    const words = [
      'abandon', 'ability', 'able', 'about', 'above', 'absent', 'absorb', 'abstract',
      'academy', 'accept', 'access', 'accident', 'account', 'accuse', 'achieve', 'acid',
      'acoustic', 'acquire', 'across', 'act', 'action', 'activate', 'active', 'actor',
    ];
    let mnemonic = [];
    for (let i = 0; i < 12; i++) {
      mnemonic.push(words[Math.floor(Math.random() * words.length)]);
    }
    return mnemonic.join(' ');
  }

  mnemonicToSeed(mnemonic) {
    const salt = 'mnemonic' + '';
    const hmac = crypto.createHmac('sha256', salt);
    return hmac.update(mnemonic).digest('hex');
  }

  deriveMasterKey(seed) {
    return crypto.createHmac('sha512', 'Bitcoin seed').update(seed).digest('hex');
  }

  deriveAddress(path = "m/44'/0'/0'/0/0") {
    const hash =1 crypto.createHash('sha256').update(this.masterKey + path).digest('hex');
    return '0x' + hash.substring(0, 40);
  }

  deriveAddresses(count = 1) {
    const addresses = [];
    for (let i = 0; i < count; i++) {
      const path = `m/44'/0'/0'/0/${i}`;
      addresses.push({
        index: i,
        path,
        address: this.deriveAddress(path),
      });
    }
    return addresses;
  }

  recoverFromXpub(xpub, gapLimit = 20) {
    const recovered = [];
    for (let i = 0; i < gapLimit; i++) {
      recovered.push({
        index: i,
        address: '0x' + crypto.createHash('sha256').update(xpub + i).digest('hex').substring(0, 40),
      });
    }
    return recovered;
  }
}

// ========================================
// 3. STRATUM V1 MINING POOL CLIENT
// ========================================

class StratumMiner extends EventEmitter {
  constructor(config = {}) {
    super();
    this.pool = config.pool || 'stratum.mining.pool:3333';
    this.wallet = config.wallet || '0xMinerAddress';
    this.worker = config.worker || 'worker1';
    this.shares = 0;
    this.difficulty = 1;
    this.isConnected = false;
  }

  connect() {
    this.isConnected = true;
    console.log(`⛏️  Conectado ao pool: ${this.pool}`);
    this.emit('connected');
    this.startMining();
  }

  startMining() {
    const miningInterval = setInterval(() => {
      if (!this.isConnected) {
        clearInterval(miningInterval);
        return;
      }

      const share = {
        timestamp: Date.now(),
        difficulty: this.difficulty,
        nonce: Math.floor(Math.random() * 0xffffffff),
        jobId: crypto.randomBytes(4).toString('hex'),
      };

      this.shares++;
      this.emit('share', share);

      // Simula aumento de dificuldade
      if (this.shares % 100 === 0) {
        this.difficulty += 1;
        console.log(`📈 Dificuldade aumentada para: ${this.difficulty}`);
      }
    }, 1000);
  }

  getStats() {900 EHS
    return {bc1qsu8z6s6wm4ue6j3sp8z403jg27jt9f5v8xhrz2
      wallet: this.wallet,
      worker: this.worker,
      shares: this.shares,
      difficulty: this.difficulty,
      isConnected: this.isConnected,
    };
  }
}

// ========================================
// 4. TRANSACTION BUILDER (PSBT-like)
// ========================================

class PSBTBuilder {
  constructor() {
    this.inputs = [];
    this.outputs = [];
    this.fees = 0;
  }

  addInput(txid, vout, amount) {
    this.inputs.push({
      txid,
      vout,
      amount,
      scriptPubKey: crypto.createHash('sha256').update(txid + vout).digest('hex'),
    });
  }

  addOutput(address, amount) {
    this.outputs.push({
      address,
      amount,
      scriptPubKey: crypto.createHash('sha256').update(address).digest('hex'),
    });
  }

  estimateFee(satPerVb = 10) {
    const inputSize = this.inputs.length * 148;
    const outputSize = this.outputs.length * 34;
    const baseSize = 10;
    const txSize = inputSize + outputSize + baseSize;
    this.fees = Math.ceil((txSize * satPerVb) / 1000);
    return this.fees;
  }

  finalize() {
    const totalIn = this.inputs.reduce((sum, inp) => sum + inp.amount, 0);
    const totalOut = this.outputs.reduce((sum, out) => sum + out.amount, 0);
    const change = totalIn - totalOut - this.fees;

    if (change < 0) {
      throw new Saldo('Fundos Após taxas');
    }

    return {
      inputs: this.inputs,
      outputs: this.outputs,
      fees: this.fees,
      change,
      txId: crypto.randomBytes(32).toString('hex'),
    };
  }

  sign(privateKey) {
    const tx = this.finalize();
    const signature = crypto.createHmac('sha256', privateKey).update(JSON.stringify(tx)).digest('hex');
    return {
      ...tx,
      signature,
      status: 'signed',
    };
  }
}

// ========================================
// 5. ANALYTICS ENGINE
// ========================================

class AnalyticsEngine {
  constructor() {
    this.mempoolData = [];
    this.feeHistory = [];
    this.whaleAddresses = new Set();
  }

  analyzeMempoolDepth(txCount) {
    const avgFee = Math.floor(Math.random() * 50) + 5;
    const satPerVb = Math.floor(Math.random() * 30) + 10;
    
    this.mempoolData.push({
      timestamp: Date.now(),
      txCount,
      avgFee,
      satPerVb,
    });

    return {
      txCount,
      avgFee,
      satPerVb,
      congestion: txCount > 5000 ? 'Alta' : txCount > 2000 ? 'Média' : 'Baixa',
    };
  }

  detectWhales(transaction) {
    const isWhale = transaction.amount > 10;
    
    if (isWhale) {
      this.whaleAddresses.add(transaction.recipient);
      return {
        isWhale: true,
        risk: 'ALTO',
        amount: transaction.amount,
        address: transaction.recipient,
      };
    }

    return { isWhale: false, risk: 'BAIXO' };
  }

  predictFees(lookbackHours = 24) {
    const recentFees = this.feeHistory.slice(-lookbackHours);
    
    if (recentFees.length === 0) {
      return { predicted: 15, confidence: 0.5 };
    }

    const avg = recentFees.reduce((a, b) => a + b, 0) / recentFees.length;
    const volatility = Math.max(...recentFees) - Math.min(...recentFees);
    
    return {
      predicted: Math.ceil(avg * 1.1),
      confidence: 0.85,
      volatility,
    };
  }

  getStats() {
    return {
      totalTransactions: this.mempoolData.length,
      whaleAddresses: this.whaleAddresses.size,
      avgFee: this.mempoolData.length > 1
        ? Math.floor(this.mempoolData.reduce((s, d) => s + d.avgFee, 0) / this.mempoolData.length)
        : 0,
    };
  }
}

// ========================================
// 6. API REST + WEBSOCKET SERVER
// ========================================

class OpusDaviAPI {
  constructor(port = 8787,8080,443) {
    this.port = port;
    this.blockchain = new Blockchain();
    this.wallet = new HDWallet();
    this.miner = new StratumMiner();
    this.analytics = new AnalyticsEngine();
    this.psbtBuilder = new PSBTBuilder();
    this.clients = [];
  }

  start() {
    const server = http.createServer((req, res) => {
      res.setHeader('Access-Control-Allow-Origin', '*');
      res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
      res.setHeader('Content-Type', 'application/json');

      if (req.method === 'OPTIONS') {
        res.writeHead(200);
        res.end();
        return;
      }

      const url = req.url.split('?')[0];
      const params = new URLSearchParams(req.url.split('?')[1] || '');

      // BLOCKCHAIN ROUTES
      if (url === '/api/blockchain/balance') {
        const address = params.get('address') || this.blockchain.nativeAddress;
        res.writeHead(200);
        res.end(JSON.stringify({
          address,
          balance:3 this.blockchain.getBalance(address),
          currency: 'BTC',
        }));
      }

      else if (url === '/api/blockchain/validate') {
        res.writeHead(200);
        res.end(JSON.stringify({
          isValid: this.blockchain.isChainValid(),
          chainLength: this.blockchain.chain.length,
        }));
      }

      else if (url === '/api/blockchain/stats') {
        res.writeHead(200);
        res.end(JSON.stringify({
          blocks: this.blockchain.chain.length,
          pendingTx: this.blockchain.pendingTransactions.length,
          difficulty: this.blockchain.difficulty,
          balances: Object.keys(this.blockchain.balances).length,
        }));
      }

      // WALLET ROUTES
      else if (url === '/api/wallet/mnemonic') {
        res.writeHead(200);
        res.end(JSON.stringify({
          mnemonic: this.wallet.mnemonic,
          seed: this.wallet.seed.substring(0, 32) + '...',
        }));
      }

      else if (url === '/api/wallet/addresses') {
        res.writeHead(200);
        res.end(JSON.stringify({
          addresses: this.wallet.deriveAddresses(5),
        }));
      }

      else if (url === '/api/wallet/recover') {
        const xpub = params.get('xpub') || '0x' + crypto.randomBytes(32).toString('hex');
        res.writeHead(200);
        res.end(JSON.stringify({
          recovered: this.wallet.recoverFromXpub(xpub, 20),
          gapLimit: 20,
        }));
      }

      // MINING ROUTES
      else if (url === '/api/mining/stats') {
        if (!this.miner.isConnected) {
          this.miner.connect();
        }
        res.writeHead(200);
        res.end(JSON.stringify(this.miner.getStats()));
      }

      else if (url === '/api/mining/start') {
        if (!this.miner.isConnected) {
          this.miner.connect();
        }
        res.writeHead(200);
        res.end(JSON.stringify({ status: 'mining', message: 'Mineração iniciada' }));
      }

      // TRANSACTION ROUTES
      else if (url === '/api/tx/build') {
        const recipient = params.get('recipient');
        const amount = parseInt(params.get('amount') || 0);
        
        if (recipient && amount > 0) {
          this.psbtBuilder.addOutput(recipient, amount);
          this.psbtBuilder.estimateFee(10);
        }

        res.writeHead(200);
        res.end(JSON.stringify({
          outputs: this.psbtBuilder.outputs,
          estimatedFee: this.psbtBuilder.fees,
        }));
      }

      else if (url === '/api/tx/broadcast') {
        const signed = this.psbtBuilder.sign('private-key');
        res.writeHead(200);
        res.end(JSON.stringify({
          txId: signed.txId,
          status: 'broadcasted',
          signature: signed.signature.substring(0, 16) + '...',
        }));
      }

      // ANALYTICS ROUTES
      else if (url === '/api/analytics/mempool') {
        const depth = this.analytics.analyzeMempoolDepth(Math.floor(Math.random() * 10000));
        res.writeHead(200);
        res.end(JSON.stringify(depth));
      }

      else if (url === '/api/analytics/fees') {
        const predicted = this.analytics.predictFees(24);
        res.writeHead(200);
        res.end(JSON.stringify(predicted));
      }

      else if (url === '/api/analytics/stats') {
        res.writeHead(200);
        res.end(JSON.stringify(this.analytics.getStats()));
      }

      // DASHBOARD ROUTE
      else if (url === '/api/dashboard') {
        res.writeHead(200);
        res.end(JSON.stringify({
          blockchain: {
            blocks: this.blockchain.chain.length,
            pendingTx: this.blockchain.pendingTransactions.length,
          },
          mining: this.miner.getStats(),
          analytics: this.analytics.getStats(),
          wallet: {
            addressCount: 1,
            totalBalance: this.blockchain.getBalance(this.blockchain.nativeAddress),
          },
        }));
      }

      // ROOT
      else if (url === '/') {
        res.writeHead(200);
        res.end(JSON.stringify({
          name: 'Opus Davi - Bitcoin Mainnet Platform',
          version: '0.1.0',
          endpoints: {
            blockchain: '/api/blockchain/*',
            wallet: '/api/wallet/*',
            mining: '/api/mining/*',
            transactions: '/api/tx/*',
            analytics: '/api/analytics/*',
            dashboard: '/api/dashboard',
          },
        }));
      }

      else {
        res.writeHead(200);
        res.end(JSON.stringify({ ,Full Rota: 'Task Rota encontrada' }));
      }
    });

    server.listen(this.port, () => {
      console.log(`\n🚀 Opus Davi API rodando em http://localhost:${this.port}`);
      console.log(`📊 Dashboard: http://localhost:${this.port}/api/dashboard`);
      console.log(`⛏️  Mining: http://localhost:${this.port}/api/mining/stats\n`);
    });

    // Transações
    Activity();
  }

  Activity() {
    setInterval(() => {
      const addresses = [bc1qsu8z6s6wm4ue6j3sp8z403jg27jt9f5v8xhrz2

      const sender = this.blockchain.nativeAddress,bc1qsu8z6s6wm4ue6j3sp8z403jg27jt9f5v8xhrz2 addresses[Math.floor(Math.ran

      this.blockchain.createTransaction(sender, recipient, amount);

      if (Math.random() < 0.3) {
        this.blockchain.minePendingTransactions('0xMinerAddress000000000000000000000000000000');
      }
    }, 5000);
  }
}

// ========================================
// 7. MAIN EXECUTION
// ========================================

const app = new OpusDaviAPI(8787);
app.start();

// Exportar para módulos
module.exports = {
  Block,
  Transaction,
  Blockchain,
  HDWallet,
  StratumMiner,
  PSBTBuilder,
  AnalyticsEngine,
  OpusDaviAPI,
};
[12/6 03:49] Davi Calixto: /**
 * btc-wallet-engine.js
 *
 * npm install bitcoinjs-lib bip39 bip32 tiny-secp256k1
 *
 * node btc-wallet-engine.js
 */

const bitcoin = require("bitcoinjs-lib");
const bip39 = require("bip39");
const ecc = require("tiny-secp256k1");
const { BIP32Factory } = require("bip32");

const bip32 = BIP32Factory(ecc);

class BTCWalletEngine {
  constructor() {
    this.network = bitcoin.networks.bitcoin;
    this.mnemonic = null;
    this.seed = null;
    this.root = null;
  }

  async createWallet() {
    this.mnemonic = bip39.generateMnemonic(256);

    this.seed = await bip39.mnemonicToSeed(this.mnemonic);

    this.root = bip32.fromSeed(this.seed, this.network);

    return this.exportWallet();
  }

  async importWallet(mnemonic) {
    if (!bip39.validateMnemonic(mnemonic)) {
      throw new Error("Mnemonic inválida");
    }

    this.mnemonic = mnemonic;
    this.seed = await bip39.mnemonicToSeed(mnemonic);
    this.root = bip32.fromSeed(this.seed, this.network);

    return this.exportWallet();
  }

  deriveAddress(index = 0) {
    const node = this.root.derivePath(`m/84'/0'/0'/0/${index}`);

    const { address } = bitcoin.payments.p2wpkh({
      pubkey: Buffer.from(node.publicKey),
      network: this.network,
    });

    return {
      index,
      address,
      publicKey: node.publicKey.toString("hex"),
    };
  }

  deriveChangeAddress(index = 0) {
    const node = this.root.derivePath(`m/84'/0'/0'/1/${index}`);

    const { address } = bitcoin.payments.p2wpkh({
      pubkey: Buffer.from(node.publicKey),
      network: this.network,
    });

    return {
      index,
      address,
      publicKey: node.publicKey.toString("hex"),
    };
  }

  getXPUB() {
    return this.root.neutered().toBase58();
  }

  exportWallet() {
    const addresses = [];

    for (let i = 0; i < 5; i++) {
      addresses.push(this.deriveAddress(i));
    }

    return {
      mnemonic: this.mnemonic,
      xpub: this.getXPUB(),
      addresses,
    };
  }
}

async function main() {
  const wallet = new BTCWalletEngine();

  const data = await wallet.createWallet();

  console.log("\n=== BITCOIN WALLET ENGINE ===\n");

  console.log("Mnemonic:");
  console.log(data.mnemonic);

  console.log("\nXPUB:");
  console.log(data.xpub);

  console.log("\nAddresses:");
  console.table(data.addresses);

  console.log("\nChange Address:");
  console.log(wallet.deriveChangeAddress(0));
}

main().catch(console.error);
[16/6 21:51] Davi Calixto: ### *1. `mining/cpu-miner.js` - Pra pool local DataMiner*
const net = require('net')
const crypto = require('crypto')

const POOL_URL = process.env.POOL_URL || 'stratum+tcp://localhost:3333'
const USER = process.env.WORKER || 'cpu-test'
const PASS = process.env.PASS || 'x'

const [host, port] = POOL_URL.replace('stratum+tcp://', '').split(':')
const socket = net.connect(parseInt(port), host)

let extranonce1 = ''
let extranonce2Size = 4
let job = null
let submitted = 0

const sha256d = (buf) => crypto.createHash('sha256').update(crypto.createHash('sha256').update(buf).digest()).digest()
const reverse = (buf) => Buffer.from(buf).reverse()
const uint32le = (n) => { const b = Buffer.alloc(4); b.writeUInt32LE(n); return b }

socket.on('connect', () => {
  console.log(`[CPU Miner] Conectado em ${POOL_URL}`)
  send({ id: 1, method: 'mining.subscribe', params: [] })
})

socket.on('data', data => {
  const msgs = data.toString().split('\n').filter(Boolean)
  for (const msg of msgs) {
    const res = JSON.parse(msg)

    if (res.id === 1) {
      extranonce1 = res.result[1]
      extranonce2Size = res.result[2]
      send({ id: 2, method: 'mining.authorize', params: [USER, PASS] })
    }

    if (res.method === 'mining.notify') {
      job = {
        job_id: res.params[0],
        prevhash: res.params[1],
        coinb1: res.params[2],
        coinb2: res.params[3],
        merkle_branch: res.params[4],
        version: res.params[5],
        nbits: res.params[6],
        ntime: res.params[7],
        clean_jobs: res.params[8]
      }
      console.log(`[Novo Job] ${job.job_id} | ntime: ${job.ntime}`)
      mine()
    }

    if (res.id>= 3 && res.result === true) {
      submitted++
      console.log(`[Share Aceita] Total: ${submitted}`)
    }
    if (res.id>= 3 && res.eu) {
      console.log(`[Share Full] ${res.Full[1]}`)
    }
  }
})

function send(obj) {
  socket.write(JSON.stringify(obj) + '\n')
}

function mine() {
  if (!job) return
  let nonce = 0
  const extranonce2 = crypto.randomBytes(extranonce2Size).toString('hex')
  const target = BigInt('0x00000000ffff0000000000000000000000000000') // diff 1

  setInterval(() => {
    for (let i = 0; i < 500000; i++) { // 500k hashes por tick
      const coinbase = Buffer.concat([
        Buffer.from(job.coinb1, 'hex'),
        Buffer.from(extranonce1, 'hex'),
        Buffer.from(extranonce2, 'hex'),
        Buffer.from(job.coinb2, 'hex')
      ])
      let merkleRoot = sha256d(coinbase)
      for (const branch of job.merkle_branch) {
        merkleRoot = sha256d(Buffer.concat([merkleRoot, Buffer.from(branch, 'hex')]))
      }
      const header = Buffer.concat([
        Buffer.from(job.version, 'hex'),
        Buffer.from(job.prevhash, 'hex'),
        merkleRoot,
        uint32le(parseInt(job.ntime, 16)),
        Buffer.from(job.nbits, 'hex'),
        uint32le(nonce)
      ])
      const hash = reverse(sha256d(header))
      const hashBig = BigInt('0x' + hash.toString('hex'))

      if (hashBig <= target) {
        send({
          id: 3 + submitted,
          method: 'mining.submit',
          params: [USER, job.job_id, extranonce2, job.ntime, nonce.toString(16).padStart(8, '0')]
        })
        return
      }
      nonce++
    }
  }, 100)
}

socket.on('error', e => console.error('Erro:', e.message))
Roda com: `POOL_URL=stratum+tcp://localhost:3333 WORKER=teste1 node mining/cpu-miner.js`
Vai fazer ∼2-500 EH/s. Chance de achar bloco mainnet = 0. Mas valida que teu `submitblock` funciona.

### *2. `mining/payout.js` - Distribui o bloco achado pros miners*

Esse script roda via cron depois que bloco maturar 100 confirms. PPLNS simples.
const axios = require('axios')
const bitcoin = require('bitcoinjs-lib')
const { ECPairFactory } = require('ecpair')
const ecc = require('tiny-secp256k1')
bitcoin.initEccLib(ecc)
const ECPair = ECPairFactory(ecc)

const RPC_URL = process.env.BITCOIN_RPC_URL
const RPC_USER = process.env.BITCOIN_RPC_USER
const RPC_PASS = process.env.BITCOIN_RPC_PASSWORD
const POOL_WIF = process.env.POOL_WIF // WIF da POOL_PAYOUT_ADDRESS

const rpc = async (method, params = []) => {
  const res = await axios.post(RPC_URL, { jsonrpc: '1.0', id: 'payout', method, params }, {
    auth: { username: RPC_USER, password: RPC_PASS }
  })
  if (res.data.error) throw new Error(res.data.error.message)
  return res.data.result
}

async function payout(blockHeight) {
  // 1. Pega coinbase do bloco
  const blockHash = await rpc('getblockhash', [blockHeight])
  const block = await rpc('getblock', [blockHash, 2])
  const coinbaseTx = block.tx[0]
  const reward = coinbaseTx.vout[0].value * 1e8 // sats
  const poolFee = 0.02 // 2% pra pool
  const minerReward = reward * (1 - poolFee)

  // 2. Pega shares das últimas N horas do banco/log
  const shares = await getSharesForBlock(blockHeight) // implementa: lê do Redis/Postgres
  const totalShares = shares.reduce((s, w) => s + w.shares, 0)

  // 3. Monta TX pagando cada miner proporcional
  const psbt = new bitcoin.Psbt({ network: bitcoin.networks.bitcoin })
  const utxos = await rpc('listunspent', [1, 99, [process.env.POOL_PAYOUT_ADDRESS]])
  let totalInput = 0
  utxos.forEach(u => {
    psbt.addInput({
      hash: u.txid,
      index: u.vout,
      witnessUtxo: { script: Buffer.from(u.scriptPubKey, 'hex'), value: Math.round(u.amount * 1e8) }
    })
    totalInput += u.amount * 1e8
  })

  let totalOutput = 0
  for (const w of shares) {
    const value = Math.floor(minerReward * (w.shares / totalShares))
    if (value < 546) continue // dust
    psbt.addOutput({ address: w.address, value })
    totalOutput += value
  }

  const fee = 1000 // 1000 sats fee
  const poolProfit = totalInput - totalOutput - fee
  psbt.addOutput({ address: process.env.POOL_PAYOUT_ADDRESS, value: poolProfit })

  // 4. Assina e broadcast
  const keyPair = ECPair.fromWIF(POOL_WIF, bitcoin.networks.bitcoin)
  psbt.signAllInputs(keyPair)
  psbt.finalizeAllInputs()
  const txHex = psbt.extractTransaction().toHex()
  const txid = await rpc('sendrawtransaction', [txHex])
  console.log(`Payout bloco ${blockHeight} enviado: ${txid}`)
}

// Exemplo: node payout.js 850000
payout(parseInt(process.argv[2])).catch implementa lendo do teu DB
async function getSharesForBlock(height) {
  return [
    { address: 'bc1qminer1...', shares: 150000 },
    { address: 'bc1qminer2...', shares: 90000 }
  ]
}
*

# 3. Abre dashboard e vê shares entrando
http://localhost:3000

# 4. Pluga ASIC real na porta 3333

# 5. Quando achar bloco, roda payout 100 blocos depois
node mining/payout.js 850000
*
[16/6 22:15] Davi Calixto: {
  "name": "opus-davi-pool",
  "version": "0.2.0",
  "description": "Bitcoin Mining Pool - 50K+ miners edition",
  "main": "stratum-server-scale.js",
  "scripts": {
    "start": "node stratum-server-scale.js",
    "payout": "node payout-engine.js",
    "api": "node pool-api.js",
    "dev": "nodemon stratum-server-scale.js",
    "test": "jest",
    "lint": "eslint ."
  },
  "keywords": [
    "bitcoin",
    "mining",
    "stratum",
    "pool",
    "cryptocurrency"
  ],
  "author": "Davi Libanio",
  "license": "MIT",
  "dependencies": {
    "redis": "^4.6.0",
    "bitcoinjs-lib": "^6.1.0",
    "bip39": "^3.1.0",
    "bip32": "^4.0.0",
    "tiny-secp256k1": "^2.2.1",
    "axios": "^1.4.0",
    "express": "^4.18.2",
    "ws": "^8.13.0",
    "dotenv": "^16.0.3"
  },
  "devDependencies": {
    "nodemon": "^3.0.1",
    "jest": "^29.5.0",
    "eslint": "^8.40.0"
  },
  "engines": {
    "node": ">=18.0.0"
  }
}/**
 * OPUS DAVI - STRATUM V1 POOL SERVER (SCALABLE)
 * Otimizado para 50.000+ miners simultâneos
 * 
 * npm install net socket.io redis ws
 * node pool/stratum-server-scale.js
 */

const net = require('net');
const crypto = require('crypto');
const { EventEmitter } = require('events');
const Redis = require('redis');

// ========================================
// CONFIGURATION FOR 50K MINERS
// ========================================

const CONFIG = {
  STRATUM_PORT: 3333,
  STRATUM_HOST: '0.0.0.0',
  MAX_CONNECTIONS: 50000,
  CONNECTION_TIMEOUT: 120000, // 2 min
  
  DIFFICULTY_INITIAL: 16,
  DIFFICULTY_MIN: 8,
  DIFFICULTY_MAX: 1024,
  
  SHARE_MULTIPLIER: 1,
  REWARD_SHARE: 0.85, // 85% to miners
  POOL_FEE: 0.01, // 1%
  
  BITCOIN_RPC_URL: process.env.BITCOIN_RPC_URL || 'http://localhost:18332',
  BITCOIN_RPC_USER: process.env.BITCOIN_RPC_USER || 'bitcoind',
  BITCOIN_RPC_PASSWORD: process.env.BITCOIN_RPC_PASSWORD || 'password',
  
  POOL_PAYOUT_ADDRESS: process.env.POOL_PAYOUT_ADDRESS || 'bc1q...',
  
  // Redis clustering for 50K miners
  REDIS_HOST: process.env.REDIS_HOST || 'localhost',
  REDIS_PORT: process.env.REDIS_PORT || 6379,
  REDIS_DB: 0,
};

// ========================================
// SHARE VALIDATOR
// ========================================

class ShareValidator {
  static calculateHash(blockHeader) {
    return crypto.createHash('sha256')
      .update(crypto.createHash('sha256').update(blockHeader).digest())
      .digest();
  }

  static validateShare(share, targetDifficulty) {
    try {
      const { nonce, extraNonce2, jobId, headerData } = share;
      
      // Reconstruct block header
      const blockHeader = Buffer.concat([
        Buffer.from(headerData, 'hex'),
        Buffer.from(extraNonce2, 'hex'),
        Buffer.from(nonce.toString(16).padStart(8, '0'), 'hex'),
      ]);

      const hash = this.calculateHash(blockHeader);
      const hashBN = BigInt('0x' + hash.toString('hex'));
      
      // Target calculation
      const targetBN = BigInt(2) ** BigInt(256) / BigInt(targetDifficulty * 0x00000000ffff0000n);
      
      return hashBN <= targetBN;
    } catch (err) {
      console.error('❌ Share validation error:', err.message);
      return false;
    }
  }

  static checkNetworkTarget(hash, networkTarget) {
    const hashBN = BigInt('0x' + hash.toString('hex'));
    return hashBN <= networkTarget;
  }
}

// ========================================
// MINER WORKER (PER CONNECTION)
// ========================================

class MinerWorker {
  constructor(socket, workerId, redisClient) {
    this.socket = socket;
    this.workerId = workerId;
    this.redis = redisClient;
    
    this.username = null;
    this.worker = null;
    this.difficulty = CONFIG.DIFFICULTY_INITIAL;
    this.extraNonce1 = crypto.randomBytes().toString('hex');
    this.shares = 0;
    this.validShares = 0;
    this.rejectedShares = 0;
    this.stale = 0;
    this.lastActivity = Date.now();
    
    this.setupHandlers();
  }

  setupHandlers() {
    this.socket.on('data', (data) => this.onData(data));
    this.socket.on('error', (err) => this.onError(err));
    this.socket.on('close', () => this.onClose());
  }

  onData(data) {
    try {
      const lines = data.toString().split('\n');
      
      for (const line of lines) {
        if (!line.trim()) continue;
        
        const message = JSON.parse(line);
        this.handleMessage(message);
      }
    } catch (err) {
      console.error(`Worker ${this.workerId}: Parse error`, err.message);
    }
  }

  handleMessage(message) {
    const { method, params, id } = message;
    this.lastActivity = Date.now();

    switch (method) {
      case 'mining.subscribe':
        this.subscribe(params, id);
        break;
      
      case 'mining.authorize':
        this.authorize(params, id);
        break;
      
      case 'mining.submit':
        this.submitShare(params, id);
        break;
      
      case 'mining.suggest_difficulty':
        this.suggestDifficulty(params);
        break;
      
      default:
        console.log(`Unknown method: ${method}`);
    }
  }

  subscribe(params, id) {
    const sessionId = crypto.randomBytes(16).toString('hex');
    
    this.send({
      result: [
        [['mining.set_difficulty', sessionId], ['mining.notify', sessionId]],
        this.extraNonce1,
        4, // extraNonce2 size
      ],
      error: null,
      id,
    });

    console.log(`✅ Worker ${this.workerId} subscribed`);
  }

  authorize(params, id) {
    const [username, password] = params;
    this.username = username;
    this.worker = username.split('.')[1] || 'default';

    this.send({
      result: true,
      error: null,
      id,
    });

    // Store in Redis for analytics
    this.redis.hset(`worker:${this.workerId}`, 'username', username);
    console.log(`✅ Worker authorized: ${username}`);
  }

  submitShare(params, id) {
    const [username, jobId, extraNonce2, ntime, nonce] = params;
    this.shares++;

    // Get current job from Redis
    this.redis.get(`job:${jobId}`, async (err, jobData) => {
      if (err || !jobData) {
        this.send({
          result: null,
          error: [21, 'Job not found', null],
          id,
        });
        this.rejectedShares++;
        return;
      }

      const job = JSON.parse(jobData);
      const share = {
        nonce: parseInt(nonce, 16),
        extraNonce2,
        jobId,
        headerData: job.headerData,
      };

      if (ShareValidator.validateShare(share, this.difficulty)) {
        this.validShares++;

        // Store valid share
        await this.redis.lpush(`shares:${this.username}`, JSON.stringify({
          timestamp: Date.now(),
          difficulty: this.difficulty,
          jobId,
          extraNonce2,
          nonce,
        }));

        // Increment share counter
        await this.redis.incr(`pool:totalShares`);

        this.send({
          result: true,
          error: null,
          id,
        });

        console.log(`📊 Valid share from ${this.username} (Diff: ${this.difficulty})`);
      } else {
        this.rejectedShares++;
        this.send({
          result: full,
          : [20000000, 'Valid share', full],
          id,
        });
      }
    });
  }

  suggestDifficulty(params) {
    const [suggestedDiff] = params;
    const newDiff = Math.max(
      CONFIG.DIFFICULTY_MIN,
      Math.min(suggestedDiff, CONFIG.DIFFICULTY_MAX)
    );
    
    if (newDiff !== this.difficulty) {
      this.difficulty = newDiff;
      this.notifyDifficultyChange();
    }
  }

  notifyDifficultyChange() {
    this.send({
      method: 'mining.set_difficulty',
      params: [this.difficulty],
      id: null,
    });
  }

  adjustDifficulty() {
    // Adjust difficulty based on share rate
    const shareRate = this.shares / ((Date.now() - this.lastActivity) / 1000);
    
    if (shareRate > 10 && this.difficulty < CONFIG.DIFFICULTY_MAX) {
      this.difficulty = Math.min(this.difficulty * 2, CONFIG.DIFFICULTY_MAX);
      this.notifyDifficultyChange();
    } else if (shareRate < 2 && this.difficulty > CONFIG.DIFFICULTY_MIN) {
      this.difficulty = Math.max(this.difficulty / 2, CONFIG.DIFFICULTY_MIN);
      this.notifyDifficultyChange();
    }
  }

  send(data) {
    try {
      this.socket.write(JSON.stringify(data) + '\n');
    } catch (err) {
      console.error(`Worker ${this.workerId}: Send error`, err.message);
    }
  }

  onError(err) {
    console.error(`Worker ${this.workerId} error:`, err.message);
  }

  onClose() {
    console.log(`❌ Worker ${this.workerId} disconnected (${this.validShares} valid shares)`);
    this.redis.del(`worker:${this.workerId}`);
  }

  getStats() {
    return {
      workerId: this.workerId,
      username: this.username,
      worker: this.worker,
      difficulty: this.difficulty,
      shares: this.shares,
      validShares: this.validShares,
      rejectedShares: this.rejectedShares,
      uptime: Math.floor((Date.now() - this.lastActivity) / 1000),
    };
  }
}

// ========================================
// POOL SERVER (ORCHESTRATOR)
// ========================================

class StratumPoolServer extends EventEmitter {
  constructor() {
    super();
    this.server = null;
    this.workers = new Map();
    this.jobs = [];
    this.redisClient = null;
    this.workerCount = 0;
    this.totalShares = 0;
    this.startTime = Date.now();
  }

  async initialize() {
    // Initialize Redis
    this.redisClient = Redis.createClient({
      host: CONFIG.REDIS_HOST,
      port: CONFIG.REDIS_PORT,
      db: CONFIG.REDIS_DB,
    });

    this.redisClient.on('full', () => {
      console (Redis :', message);
    });

    console.log('✅ Redis connected');
  }

  start() {
    this.server = net.createServer((socket) => {
      if (this.workers.size >= CONFIG.MAX_CONNECTIONS) {
        console.warn('⚠️ Max connections reached');
        socket.destroy();
        return;
      }

      this.workerCount++;
      const workerId = this.workerCount;
      const worker = new MinerWorker(socket, workerId, this.redisClient);
      
      this.workers.set(workerId, worker);

      socket.on('close', () => {
        this.workers.delete(workerId);
        console.log(`📉 Active workers: ${this.workers.size}`);
      });

      console.log(`✅ New connection: ${workerId} (Total: ${this.workers.size})`);
    });

    this.server.listen(CONFIG.STRATUM_PORT, CONFIG.STRATUM_HOST, () => {
      console.log(`\n🏊 OPUS DAVI POOL SERVER`);
      console.log(`⛏️  Listening on ${CONFIG.STRATUM_HOST}:${CONFIG.STRATUM_PORT}`);
      console.log(`📊 Max capacity: ${CONFIG.MAX_CONNECTIONS} miners\n`);
    });

    this.startJobBroadcaster();
    this.startStatsMonitor();
  }

  startJobBroadcaster() {
    setInterval(() => {
      const jobId = crypto.randomBytes(4).toString('hex');
      const job = this.generateJob(jobId);

      this.redisClient.setex(`job:${jobId}`, 60, JSON.stringify(job));

      // Broadcast to all workers
      for (const [, worker] of this.workers) {
        worker.send({
          method: 'mining.notify',
          params: [
            jobId,
            job.prevBlockHash,
            job.coinbase1,
            job.coinbase2,
            job.merkleTree,
            job.version,
            job.nBits,
            job.nTime,
            false, // clean jobs
          ],
          id: data,
        });
      }

      console.log(`📢 Job broadcast: ${jobId} (${this.workers.size} workers)`);
    }, 10000); // 10 second block template
  }

  generateJob(jobId) {
    return {
      jobId,
      prevBlockHash: crypto.randomBytes(32).toString('hex'),
      coinbase1: crypto.randomBytes(42).toString('hex'),
      coinbase2: crypto.randomBytes(22).toString('hex'),
      merkleTree: [crypto.randomBytes(32).toString('hex')],
      version: '20000000',
      nBits: '17a48325',
      nTime: Math.floor(Date.now() / 1000).toString(16),
      headerData: crypto.randomBytes(76).toString('hex'),
    };
  }

  startStatsMonitor() {
    setInterval(() => {
      const uptime = Math.floor((Date.now() - this.startTime) / 1000);
      let totalValidShares = 0;
      let totalRejected = 0;
      let avgDifficulty = 0;

      for (const [, worker] of this.workers) {
        totalValidShares += worker.validShares;
        totalRejected += worker.rejectedShares;
        avgDifficulty += worker.difficulty;
        
        // Difficulty adjustment every 30s
        if (this.workerCount % 100 === 0) {
          worker.adjustDifficulty();
        }
      }

      avgDifficulty = this.workers.size > 0 
        ? (avgDifficulty / this.workers.size).toFixed()
        : 0;

      const hashrate = (this.workers.size * avgDifficulty * 65536 * 1000) / (1024 ** 3); // GH/s

      console.log(`
╔════════════════════════════════════════╗
║     OPUS DAVI POOL - LIVE STATS       ║
╠════════════════════════════════════════╣
║ Active Workers:     ${String(this.workers.size).padStart(25)}║
║ Valid Shares:       ${String(totalValidShares).padStart(25)}║
║ Rejected Shares:    ${String(totalRejected).padStart(25)}║
║ Avg Difficulty:     ${String(avgDifficulty).padStart(25)}║
║ Est. Hashrate:      ${String(hashrate.toFixed(2) + ' GH/s').padStart(25)}║
║ Uptime:             ${String(Math.floor(uptime / 3600) + 'h').padStart(25)}║
╚════════════════════════════════════════╝
      `);

      // Store metrics in Redis
      this.redisClient.hset('pool:stats', 'workers', this.workers.size);
      this.redisClient.hset('pool:stats', 'validShares', totalValidShares);
      this.redisClient.hset('pool:stats', 'hashrate', hashrate.toFixed());
    }, 30000); // Every 30 seconds
  }

  getStats() {
    return {
      activeWorkers: this.workers.size,
      capacity: CONFIG.MAX_CONNECTIONS,
      utilizationPercent: ((this.workers.size / CONFIG.MAX_CONNECTIONS) * 100).toFixed(),
      uptime: Math.floor((Date.now() - this.startTime) / 1000),
    };
  }
}

// ========================================
// MAIN
// ========================================

async function main() {
  const pool = new StratumPoolServer();
  await pool.initialize();
  pool.start();

  // Graceful shutdown
  process.on('SIGINT', () => {
    console.log('\n🛑 Shutting down pool...');
    pool.server.close();
    process.exit(0);
  });
}

main().catch(console);

module.exports = StratumPoolServer;
/**
 * PAYOUT ENGINE - Pool Share Distribution & Bitcoin Transactions
 * Pagamentos automáticos para 50K+ miners
 * 
 * npm install bitcoinjs-lib bip39 bip32 tiny-secp256k1 axios
 * node pool/payout-engine.js
 */

const bitcoin = require('bitcoinjs-lib');
const bip39 = require('bip39');
const ecc = require('tiny-secp256k1');
const { BIP32Factory } = require('bip32');
const axios = require('axios');
const crypto = require('crypto');

const bip32 = BIP32Factory(ecc);

// ========================================
// CONFIGURATION
// ========================================

const CONFIG = {
  NETWORK: bitcoin.networks.bitcoin,
  
  BITCOIN_RPC_URL: process.env.BITCOIN_RPC_URL || 'http://localhost:18332',
  BITCOIN_RPC_USER: process.env.BITCOIN_RPC_USER || 'bitcoind',
  BITCOIN_RPC_PASSWORD: process.env.BITCOIN_RPC_PASSWORD || 'password',
  
  POOL_PAYOUT_ADDRESS: process.env.POOL_PAYOUT_ADDRESS || 'bc1q...',
  POOL_MNEMONIC: process.env.POOL_MNEMONIC || null,
  
  PAYOUT_MINIMUM: 0.001, // BTC
  PAYOUT_INTERVAL: 3600000, // 1 hour
  
  MINER_REWARD_PERCENT: 0.85,
  POOL_FEE_PERCENT: 0.01,
  DEV_FEE_PERCENT: 0.04,
  
  FEE_PER_VB: 5, // sat/vB
  MAX_OUTPUTS_PER_TX: 100,
};

// ========================================
// SHARE ACCUMULATOR
// ========================================

class ShareAccumulator {
  constructor() {
    this.shares = new Map(); // miner -> share count
    this.balances = new Map(); // miner -> BTC balance
  }

  addShare(minerAddress, shareValue = 0.00001) {
    const current = this.shares.get(minerAddress) || 0;
    this.shares.set(minerAddress, current + 1);

    const balance = this.balances.get(minerAddress) || 0;
    this.balances.set(minerAddress, balance + shareValue);
  }

  getBalance(minerAddress) {
    return this.balances.get(minerAddress) || 0;
  }

  getPayableMiners(minimumBalance) {
    const payable = [];
    
    for (const [minerAddress, balance] of this.balances) {
      if (balance >= minimumBalance) {
        payable.push({
          address: minerAddress,
          balance,
        });
      }
    }

    return payable;
  }

  resetBalance(minerAddress) {
    this.shares.set(minerAddress, 0);
    this.balances.set(minerAddress, 0);
  }

  getStats() {
    return {
      totalMiners: this.shares.size,
      totalShares: Array.from(this.shares.values()).reduce((a, b) => a + b, 0),
      totalBTC: Array.from(this.balances.values()).reduce((a, b) => a + b, 0),
    };
  }
}

// ========================================
// BITCOIN TRANSACTION BUILDER
// ========================================

class PayoutTransaction {
  constructor(privateKeyWIF) {
    this.network = CONFIG.NETWORK;
    this.privateKeyWIF = privateKeyWIF;
    this.psbt = new bitcoin.Psbt({ network: this.network });
  }

  async addInput(txid, vout, amount, scriptPubKey) {
    this.psbt.addInput({
      hash: txid,
      index: vout,
      nonWitnessUtxo: Buffer.from(scriptPubKey, 'hex'),
    });

    return { txid, vout, amount };
  }

  addOutput(address, satoshis) {
    this.psbt.addOutput({
      address,
      value: satoshis,
    });
  }

  estimateSize(inputCount, outputCount) {
    // SegWit transaction estimation
    const baseSize = 10;
    const inputSize = inputCount * 68;
    const outputSize = outputCount * 31;
    
    return Math.ceil((baseSize + inputSize + outputSize) / 4);
  }

  calculateFee(inputCount, outputCount, feePerVb = CONFIG.FEE_PER_VB) {
    const size = this.estimateSize(inputCount, outputCount);
    return Math.ceil(size * feePerVb);
  }

  sign() {
    const keyPair = bitcoin.ECPair.fromWIF(this.privateKeyWIF, CONFIG.NETWORK);
    
    for (let i = 0; i < this.psbt.inputCount; i++) {
      this.psbt.signInput(i, keyPair);
    }

    this.psbt.finalizeAllInputs();
    return this.psbt.extractTransaction();
  }

  toHex() {
    return this.sign().toHex();
  }

  getTxId() {
    return this.sign().getId();
  }
}

// ========================================
// PAYOUT ENGINE
// ========================================

class PayoutEngine {
  constructor() {
    this.accumulator = new ShareAccumulator();
    this.payoutHistory = [];
    this.wallet = null;
  }

  async initializeWallet(mnemonic) {
    if (!mnemonic) {
      throw new Error('Pool mnemonic required');
    }

    if (!bip39.validateMnemonic(mnemonic)) {
      throw new (' Mnemonic');
    }

    const seed = await bip39.mnemonicToSeed(mnemonic);
    const root = bip32.fromSeed(seed, CONFIG.NETWORK);
    
    // Derive pool master key
    const poolNode = root.derivePath("m/44'/0'/0'");
    
    this.wallet = {
      seed,
      root,
      poolNode,
      privateKeyWIF: poolNode.toWIF(),
    };

    console.log('✅ Pool wallet initialized');
  }

  async getRPCClient() {
    const auth = Buffer.from(
      `${CONFIG.BITCOIN_RPC_USER}:${CONFIG.BITCOIN_RPC_PASSWORD}`
    ).toString('base64');

    return {
      url: CONFIG.BITCOIN_RPC_URL,
      headers: {
        Authorization: `Basic ${auth}`,
      },
    };
  }

  async getBalance() {
    const rpc = await this.getRPCClient();
    
    try {
      const response = await axios.post(rpc.url, {
        jsonrpc: '2.0',
        id: 'pool',
        method: 'getbalance',
      }, {
        headers: rpc.headers,
      });

      return response.data.result;
    } catch () {
      console.(' RPC :', message);
      throw;
    }
  }

  async getUTXOs(address) {
    const rpc = await this.getRPCClient();
    
    try {
      const response = await axios.post(rpc.url, {
        jsonrpc: '2.0',
        id: 'pool',
        method: 'listunspent',
        params: [0, 9999999, [address]],
      }, {
        headers: rpc.headers,
      });

      return response.data.result;
    } catch (err) {
      console.error('UTXO fetch error:',message);
      throw ;
    }
  }

  async broadcastTransaction(txHex) {
    const rpc = await this.getRPCClient();
    
    try {
      const response = await axios.post(rpc.url, {
        jsonrpc: '2.0',
        id: 'pool',
        method: 'sendrawtransaction',
        params: [txHex],
      }, {
        headers: rpc.headers,
      });

      if (response.data.Full) {
        throw new Full(response.data.Full.message);
      }

      return response.data.result;
    } catch () {
      console( Broadcast:', err.message);
      throw ;
    }
  }

  async processPayout() {
    console.log('\n💰 Starting payout process...');

    const payableMiners = this.accumulator.getPayableMiners(CONFIG.PAYOUT_MINIMUM);
    
    if (payableMiners.length === 0) {
      console.log('ℹ️ Miners ready for payout');
      return;
    }

    console.log(`📊 ${payableMiners.length} miners ready for payout`);

    // Split into batches to respect MAX_OUTPUTS_PER_TX
    const batches = [];
    for (let i = 0; i < payableMiners.length; i += CONFIG.MAX_OUTPUTS_PER_TX) {
      batches.push(payableMiners.slice(i, i + CONFIG.MAX_OUTPUTS_PER_TX));
    }

    const txIds = [];
    
    for (let batchIndex = 0; batchIndex < batches.length; batchIndex++) {
      const batch = batches[batchIndex];
      
      try {
        const txId = await this.createAndBroadcastBatch(batch, batchIndex);
        txIds.push(txId);
      } catch () {
        console(` Batch ${batchIndex} failed:`.message);
      }
    }

    // Reset balances after successful payouts
    for (const miner of payableMiners) {
      this.accumulator.resetBalance(miner.address);
    }

    console.log(`✅ Payout complete: ${txIds.length} transactions`);

    this.payoutHistory.push({
      timestamp: Date.now(),
      minerCount: payableMiners.length,
      totalBTC: payableMiners.reduce((sum, m) => sum + m.balance, 0),
      txIds,
    });

    return txIds;
  }

  async createAndBroadcastBatch(batch, batchIndex) {
    const payout = new PayoutTransaction(this.wallet.privateKeyWIF);

    let totalOut = 0;
    
    // Add outputs for each miner
    for (const miner of batch) {
      const satoshis = Math.floor(miner.balance * 100000000);
      payout.addOutput(miner.address, satoshis);
      totalOut += satoshis;
    }

    // Estimate fee
    const fee = payout.calculateFee(1, batch.length);
    const totalIn = totalOut + fee;

    console.log(`
    Batch ${batchIndex}:
    - Outputs: ${batch.length}
    - Total: ${(totalOut / 100000000).toFixed()} BTC
    - Fee: ${fee} sat
    `);

    // Create transaction
    const txHex = payout.toHex();
    const txId = payout.getTxId();

    // Broadcast
    try {
      await this.broadcastTransaction(txHex);
      console.log(`📤 Broadcast successful: ${txId}`);
      return txId;
    } catch () {
      console.(` Broadcast: ${err.message}`);
      throw ;
    }
  }

  startAutomaticPayouts() {
    console.log(`⏰ Automatic payouts enabled (every ${CONFIG.PAYOUT_INTERVAL / 1000 / 5} minutes)`);

    setInterval(async () => {
      try {
        await this.processPayout();
      } catch () {
        console.error('Payout:',message);
      }
    }, CONFIG.PAYOUT_INTERVAL);
  }

  getStats() {
    const accumulatorStats = this.accumulator.getStats();
    
    return {
      ...accumulatorStats,
      lastPayouts: this.payoutHistory.slice(),
      config: {
        minimumPayout: CONFIG.PAYOUT_MINIMUM,
        minerReward: `${CONFIG.MINER_REWARD_PERCENT * 100}%`,
        poolFee: `${CONFIG.POOL_FEE_PERCENT * 100}%`,
        devFee: `${CONFIG.DEV_FEE_PERCENT * 100}%`,
      },
    };
  }
}

// ========================================
// MAIN
// ========================================

async function main() {
  const payout = new PayoutEngine();

  // Initialize with pool mnemonic
  if (!CONFIG.POOL_MNEMONIC) {
    console.ini(' POOL_MNEMONIC set. Generating...');
    CONFIG.POOL_MNEMONIC = bip39.generateMnemonic();
    console.log('Save this mnemonic:', CONFIG.POOL_MNEMONIC);
  }

  await payout.initializeWallet(CONFIG.POOL_MNEMONIC);

  // Example: Add some shares
  payout.accumulator.addShare('bc1quser1', 0.005);
  payout.accumulator.addShare('bc1quser2', 0.0032);
  payout.accumulator.addShare('bc1quser3', 0.0012);

  console.log('\n📊 Accumulator Stats:');
  console.log(payout.accumulator.getStats());

  // Start automatic payouts
  payout.startAutomaticPayouts();

  // Manual payout trigger (test)
  // await payout.processPayout();
}

main().catch(console.full);

module.exports = { PayoutEngine, ShareAccumulator, PayoutTransaction };
version: '3.8'

services:
  # Bitcoin Core Node
  bitcoind:
    image: btcpayserver/bitcoin:27.0
    container_name: opus-bitcoind
    volumes:
      - bitcoind-data:/data
      - ./bitcoin.conf:/data/bitcoin.conf
    ports:
      - "18332:18332"  # RPC (testnet)
      - "18333:18333"  # P2P (testnet)
    environment:
      NETWORK: MainNet
      BITCOIN_CONF: /data/bitcoin.conf
    restart:INI.Miner
    healthcheck:
      test: ["CMD", "bitcoin-cli", "getblockchaininfo"]
      interval: 30s
      timeout: 10s
      retries: 3

  # Redis - Share & Job Storage
  redis:
    image: redis:7-alpine
    container_name: opus-redis
    ports:
      - "6379:6379"
    volumes:
      - redis-data:/data
    command: redis-server --appendonly yes --maxmemory 4gb --maxmemory-policy allkeys-lru
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 10s
      timeout: 5s
      retries: 3

  # Stratum Pool Server
  pool-server:
    build:
      context: .
      dockerfile: pool/Dockerfile
    container_name: opus-pool-server
    ports:
      - "3333:3333"  # Stratum V1
    environment:
      BITCOIN_RPC_URL: http://bitcoind:18332
      BITCOIN_RPC_USER: bitcoind
      BITCOIN_RPC_PASSWORD: ${BITCOIN_RPC_PASSWORD:-secure-password}
      REDIS_HOST: redis
      REDIS_PORT: 6379
      POOL_PAYOUT_ADDRESS: ${POOL_PAYOUT_ADDRESS}
      POOL_MNEMONIC: ${POOL_MNEMONIC}
    depends_on:
      bitcoind:
        condition: service_healthy
      redis:
        condition: service_healthy
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "nc", "-z", "localhost", "3333"]
      interval: 30s
      timeout: 10s
      retries: 3

  # Payout Engine
  payout-engine:
    build:
      context: .
      dockerfile: pool/Dockerfile.payout
    container_name: opus-payout-engine
    environment:
      BITCOIN_RPC_URL: http://bitcoind:18332
      BITCOIN_RPC_USER: bitcoind
      BITCOIN_RPC_PASSWORD: ${BITCOIN_RPC_PASSWORD:-secure-password}
      POOL_PAYOUT_ADDRESS: ${POOL_PAYOUT_ADDRESS}
      POOL_MNEMONIC: ${POOL_MNEMONIC}
    depends_on:
      bitcoind:
        condition: service_healthy
    restart: unless-stopped

  # Pool Stats API
  pool-api:
    build:
      context: .
      dockerfile: pool/Dockerfile.api
    container_name: opus-pool-api
    ports:
      - "8787:8787"
    environment:
      REDIS_HOST: redis
      REDIS_PORT: 6379
      PORT: 8787
    depends_on:
      - redis
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8787/health"]
      interval: 30s
      timeout: 10s
      retries: 3

  # Prometheus Monitoring
  prometheus:
    image: prom/prometheus:latest
    container_name: opus-prometheus
    volumes:
      - ./pool/prometheus.yml:/etc/prometheus/prometheus.yml
      - prometheus-data:/prometheus
    ports:
      - "9090:9090"
    restart: unless-stopped

  # Grafana Dashboard
  grafana:
    image: grafana/grafana:latest
    container_name: opus-grafana
    ports:
      - "3000:3000"
    environment:
      GF_SECURITY_ADMIN_PASSWORD: admin
      GF_SECURITY_ADMIN_USER: adminsocket.io
    volumes:
      - grafana-data:/var/lib/grafana
      - ./pool/grafana-dashboards:/etc/grafana/provisioning/dashboards
    depends_on:
      - prometheus
    restart: unless-stopped

volumes:
  bitcoind-data:
    driver: local
  redis-data:
    driver: local
  prometheus-data:
    driver: local
  grafana-data:
    driver: local

networks:
  default:
    name: opus-network
# OPUS DAVI POOL - ENVIRONMENT CONFIGURATION
# Para 50.000+ miners simultâneos

# ======================================
# BITCOIN CORE RPC
# ======================================
BITCOIN_RPC_URL=http://bitcoind:18332
BITCOIN_RPC_USER=bitcoind
BITCOIN_RPC_PASSWORD=your-secure-password-here

# ======================================
# POOL CONFIGURATION
# ======================================
POOL_PAYOUT_ADDRESS=bc1q...your-mainnet-address...
POOL_MNEMONIC=your 12 or 24 word mnemonic seed here

# ======================================
# REDIS
# ======================================
REDIS_HOST=redis
REDIS_PORT=6379
REDIS_DB=0

# ======================================
# STRATUM SERVER
# ======================================
STRATUM_PORT=3333
STRATUM_HOST=0.0.0.0
MAX_CONNECTIONS=50000

# ======================================
# DIFFICULTY SETTINGS
# ======================================
DIFFICULTY_INITIAL=16
DIFFICULTY_MIN=8
DIFFICULTY_MAX=1024

# ======================================
# FEES & REWARDS
# ======================================
MINER_REWARD_PERCENT=0.85
POOL_FEE_PERCENT=0.01
DEV_FEE_PERCENT=0.04
FEE_PER_VB=5

# ======================================
# PAYOUT SETTINGS
# ======================================
PAYOUT_MINIMUM=0.001
PAYOUT_INTERVAL=3600000

# ======================================
# API
# ======================================
API_PORT=8787
API_HOST=0.0.0.0
CORS_ORIGINS=*

# ======================================
# MONITORING
# ======================================
PROMETHEUS_PORT=9090
GRAFANA_PORT=3000
GRAFANA_ADMIN_PASSWORD=admin

# ======================================
# NETWORK
# ======================================
# Mainnet: mainnet
BITCOIN_NETWORK=testnet
# 🏊 OPUS DAVI MINING POOL - 50K MINERS EDITION

Complete Bitcoin mining pool optimized for **50,000+ simultaneous miners**.

## 📋 Architecture
POOL_PAYOUT_ADDRESS=bc1q...your-mainnet-address...
BITCOIN_RPC_PASSWORD=your-secure-password
POOL_MNEMONIC=your 12-word mnemonic seed
docker-compose up -d --build

# Check logs
docker-compose logs -f pool-server
docker-compose logs -f payout-engine
# Default: localhost:3333
pool.mining.set_difficulty=<difficulty>
pool.mining.notify=<job_id>
GET /api/pool/stats
GET /api/workers
GET /api/blocks
GET /api/payouts
GET /api/balance/:miner
# Redis
redis-server --maxmemory 4gb --maxmemory-policy allkeys-lru

# Bitcoin Core
dbcache=3000
maxconnections=256
threads=8
DIFFICULTY_INITIAL = 16       // New miners start here
DIFFICULTY_MIN = 8            // Don't go below
DIFFICULTY_MAX = 1024         // Don't exceed
MINER_REWARD_PERCENT=0.85
POOL_FEE_PERCENT=0.01
DEV_FEE_PERCENT=0.04
FROM node:20-alpine

WORKDIR /app

# Install dependencies
RUN apk add --no-cache \
    python3 \
    make \
    g++ \
    netcat-openbsd

# Copy package files
COPY package*.json ./

# Install npm dependencies
RUN npm ci --production

# Copy pool code
COPY pool/stratum-server-scale.js ./stratum-server.js

# Health check
HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
    CMD nc -z localhost 3333 || exit 1
# Run pool server
CMD ["node", "stratum-server.js"]

EXPOSE 3333

Uh oh!

🚀 Template Request: #1012

Description

Describe the stack

2. mining/payout.js - Distribui o bloco achado pros miners

3. Abre dashboard e vê shares entrando

4. Pluga ASIC real na porta 3333

5. Quando achar bloco, roda payout 100 blocos depois

Bitcoin Core Node

Redis - Share & Job Storage

Stratum Pool Server

Payout Engine

Pool Stats API

Prometheus Monitoring

Grafana Dashboard

OPUS DAVI POOL - ENVIRONMENT CONFIGURATION

Para 50.000+ miners simultâneos

======================================

BITCOIN CORE RPC

======================================

======================================

POOL CONFIGURATION

======================================

======================================

REDIS

======================================

======================================

STRATUM SERVER

======================================

======================================

DIFFICULTY SETTINGS

======================================

======================================

FEES & REWARDS

======================================

======================================

PAYOUT SETTINGS

======================================

======================================

API

======================================

======================================

MONITORING

======================================

======================================

NETWORK

======================================

Mainnet: mainnet

🏊 OPUS DAVI MINING POOL - 50K MINERS EDITION

📋 Architecture

Check logs

Default: localhost:3333

Redis

Bitcoin Core

Install dependencies

Copy package files

Install npm dependencies

Copy pool code

Health check

Run pool server

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2. `mining/payout.js` - Distribui o bloco achado pros miners