Javascript ethereumjs util中的pubToAddress方法抛出断言错误：false==true

我在nodejs上有以下代码： var Keythsum=要求（“Keythsum”）； var crypto=要求（“加密”）； var eccrypto=需要（“eccrypto”）； var pubToAddress=require（“ethereumjs util”）.pubToAddress； var ecdsa=新的（需要（“椭圆”）.ec）（“secp256k1”）

它抛出如下断言错误：

AssertionError: false == true
    at exports.pubToAddress.exports.publicToAddress (/myHomeDir/node_modules/ethereumjs-util/index.js:323:3)
    at repl:1:15
    at realRunInThisContextScript (vm.js:22:35)
    at sigintHandlersWrap (vm.js:98:12)
    at ContextifyScript.Script.runInThisContext (vm.js:24:12)
    at REPLServer.defaultEval (repl.js:346:29)
    at bound (domain.js:280:14)
    at REPLServer.runBound [as eval] (domain.js:293:12)
    at REPLServer.onLine (repl.js:544:10)
    at emitOne (events.js:101:20)

发现失败的断言是：

/**
 * Returns the ethereum address of a given public key.
 * Accepts "Ethereum public keys" and SEC1 encoded keys.
 * @param {Buffer} pubKey The two points of an uncompressed key, unless sanitize is enabled
 * @param {Boolean} [sanitize=false] Accept public keys in other formats
 * @return {Buffer}
 */
exports.pubToAddress = exports.publicToAddress = function (pubKey, sanitize) {
  pubKey = exports.toBuffer(pubKey)
  if (sanitize && (pubKey.length !== 64)) {
    pubKey = secp256k1.publicKeyConvert(pubKey, false).slice(1)
  }
  assert(pubKey.length === 64)
  // Only take the lower 160bits of the hash
  return exports.sha3(pubKey).slice(-20)
}

我应该从地址中删除第一个字节（04）吗

这段代码基于尝试创建以太坊私钥并获取其相应的公钥和地址。它在最后一步失败了。任何关于正在发生的事情的暗示都会很有帮助。谢谢

此代码工作正常：

var keythereum = require('keythereum');
var crypto = require("crypto");
var util = require("ethereumjs-util");

// A new random 32-byte private key.
var privateKey = crypto.randomBytes(32);

var publicKey = util.privateToPublic(privateKey);
console.log(publicKey);

var address = util.pubToAddress(publicKey).toString("hex");
console.log(address);

var Tx = require('ethereumjs-tx');
// var privateKey = new Buffer('e331b6d69882b4cb4ea581d88e0b604039a3de5967688d3dcffdd2270c0fd109', 'hex');

var rawTx = {
  nonce: '0x00',
  gasPrice: '0x09184e72a000',
  gasLimit: '0x2710',
  to: '0x0000000000000000000000000000000000000000',
  value: '0x00',
  data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057'
}

var tx = new Tx(rawTx);
tx.sign(privateKey);

var serializedTx = tx.serialize();
console.log(serializedTx.toString('hex'));

重点是使用：

var publicKey = util.privateToPublic(privateKey);

而不是：

var publicKey = eccrypto.getPublic(privateKey);

因为前者返回一个64字节的公钥，而后者返回一个65字节的公钥，后跟一个“04”字节。

此代码工作正常：

var keythereum = require('keythereum');
var crypto = require("crypto");
var util = require("ethereumjs-util");

// A new random 32-byte private key.
var privateKey = crypto.randomBytes(32);

var publicKey = util.privateToPublic(privateKey);
console.log(publicKey);

var address = util.pubToAddress(publicKey).toString("hex");
console.log(address);

var Tx = require('ethereumjs-tx');
// var privateKey = new Buffer('e331b6d69882b4cb4ea581d88e0b604039a3de5967688d3dcffdd2270c0fd109', 'hex');

var rawTx = {
  nonce: '0x00',
  gasPrice: '0x09184e72a000',
  gasLimit: '0x2710',
  to: '0x0000000000000000000000000000000000000000',
  value: '0x00',
  data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057'
}

var tx = new Tx(rawTx);
tx.sign(privateKey);

var serializedTx = tx.serialize();
console.log(serializedTx.toString('hex'));

重点是使用：

var publicKey = util.privateToPublic(privateKey);

而不是：

var publicKey = eccrypto.getPublic(privateKey);

---

因为前者返回一个64字节的公钥，而后者返回一个65字节的公钥，后跟一个“04”字节。

为什么是65字节的公钥？为什么是65字节的公钥？