如何使用eth-lightwallet“无种子集”从密钥存储中提取私钥？

Question

我在NodeJS服务器上使用。当我尝试从keystore获取私钥时，我会得到一个堆栈跟踪。它正在标记这一行“keystore.generateNewAddress(PwDerivedKey)”；我看不出它是如何关联的。当我注释掉"account.prv_key = keystore.exportPrivateKey(sendingAddr，pwDerivedKey)“一行时，它似乎完美无缺地工作了。我做错什么了吗？错误是抛出“无种子集”，然而，当我查看调试模式时，种子是最肯定设置的。我对Node很陌生，并怀疑它与Node的异步特性有关。我已经包含了下面的代码和堆栈跟踪。谢谢。

lightwallet.keystore.deriveKeyFromPassword('mypassword',
    function (err, pwDerivedKey) {
      var seed = lightwallet.keystore.generateRandomSeed();
      var keystore = new lightwallet.keystore(seed, pwDerivedKey);

      keystore.generateNewAddress(pwDerivedKey);
      account.address = keystore.getAddresses()[0];
      account.prv_key = keystore.exportPrivateKey(sendingAddr, pwDerivedKey);
    })



/Users/username/WebstormProjects/eth-project/nodejs-server/node_modules/eth-lightwallet/lib/keystore.js:389
    throw new Error('KeyStore.generateNewAddress: No seed set');
    ^

Error: KeyStore.generateNewAddress: No seed set
    at KeyStore.generateNewAddress (/Users/username/WebstormProjects/eth-project/nodejs-server/node_modules/eth-lightwallet/lib/keystore.js:389:11)
    at /Users/username/WebstormProjects/eth-project/nodejs-server/controllers/ActorService.js:39:20
    at cb (/Users/username/WebstormProjects/eth-project/nodejs-server/node_modules/eth-lightwallet/lib/keystore.js:459:7)
    at /Users/username/WebstormProjects/eth-project/nodejs-server/node_modules/eth-lightwallet/node_modules/scrypt-async/scrypt-async.js:474:9
    at Immediate._onImmediate (/Users/username/WebstormProjects/eth-project/nodejs-server/node_modules/eth-lightwallet/node_modules/scrypt-async/scrypt-async.js:433:11)
    at processImmediate [as _immediateCallback] (timers.js:383:17)

Answer 1

您的处理程序函数可能有一些错误，使处理程序无法正确执行。您可以检查是否在处理程序中设置了"err“，并将其打印出来，以查看它到底是什么错误。对于我来说，如果我运行您的确切代码，我必须删除对“帐户”的引用，并在代码运行之前将"sendingAddr“更改为密钥存储库的第一个地址。确保在代码上下文中定义了这两个变量。这是对我有用的代码：

lightwallet.keystore.deriveKeyFromPassword('mypassword',
function (err, pwDerivedKey) {
  var seed = lightwallet.keystore.generateRandomSeed();
  var keystore = new lightwallet.keystore(seed, pwDerivedKey);

  keystore.generateNewAddress(pwDerivedKey);
  var address = keystore.getAddresses()[0];
  var prv_key = keystore.exportPrivateKey(address, pwDerivedKey);
  console.log('address and key: ', address, prv_key);
})