javascript - TypeError：没有'new'就不能调用类构造函数CryptoFactory

Question

我想使用sawtooth-sdk和指南代码（https://sawtooth.hyperledger.org/docs/core/releases/latest/_autogen/sdk_submit_tutorial_js.html）：

const {createContext, CryptoFactory} = require('sawtooth-sdk/signing')

const context = createContext('secp256k1')
const privateKey = context.newRandomPrivateKey()
const signer = CryptoFactory(context).newSigner(privateKey)

但错误：

TypeError: Class constructor CryptoFactory cannot be invoked without 'new'

Answer 1

如错误所述，您应该更改：

const signer = CryptoFactory(context).newSigner(privateKey)

到：

const signer = (new CryptoFactory(context)).newSigner(privateKey)