// SHA-256 哈希示例
const crypto = require('crypto');

function sha256(data) {
  return crypto.createHash('sha256').update(data).digest('hex');
}

const blockHeader = "0000000000000000000a1b2c3d4e5f6789012345678901234567890123456789";
const hash = sha256(blockHeader);
console.log(hash);

// 区块结构示例
const block = {
  header: {
    version: 1,
    prevBlockHash: "0000000000000000000a1b2c3d4e5f6789012345678901234567890123456789",
    merkleRoot: "3ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a",
    timestamp: 1231006505,
    difficulty: 486604799,
    nonce: 2083236893
  },
  transactions: [
    // 交易数据
  ]
};

// 挖矿难度计算示例
function calculateDifficulty(target) {
  const maxTarget = "0x00000000ffff0000000000000000000000000000000000000000000000000000";
  return parseInt(maxTarget, 16) / parseInt(target, 16);
}

const currentTarget = "0x1a05db8b";
const difficulty = calculateDifficulty(currentTarget);
console.log(`当前难度: ${difficulty}`);

// UTXO示例
const utxo = {
  txid: "a1b2c3d4e5f6789012345678901234567890123456789012345678901234567890",
  vout: 0,
  value: 0.001,
  scriptPubKey: "76a91462e907b15cbf27d5425399ebf6f0fb50ebb88f1888ac"
};