npm solc:AssertionError [ERR_ASSERTION]:指定了无效的回调 [英] npm solc: AssertionError [ERR_ASSERTION]: Invalid callback specified

问题描述

我正在尝试使用npm solc编译Solidity智能合约.我尝试遵循不同的示例.链接到示例: https://medium.com/coinmonks/如何编译一个solidity-smart-contract-using-node-js-51ea7c6bf440

I am trying to compile solidity smart contract using npm solc. I tried to follow different examples. Link to example: https://medium.com/coinmonks/how-to-compile-a-solidity-smart-contract-using-node-js-51ea7c6bf440

我写了如下代码:

const path = require('path');
const fs = require('fs');
const solc = require('solc');



const helloPath = path.resolve(__dirname, 'contracts', 'hello.sol');
console.log("First" + helloPath);
const source = fs.readFileSync(helloPath, 'UTF-8');
console.log("Second" + source);
console.log(solc.compile(source, 1));

运行以上代码时出现以下错误.

I am getting following error when running the above code.

AssertionError [ERR_ASSERTION]: Invalid callback specified.
    at wrapCallback (C:\Users\mouazzamj058\solc_example\node_modules\solc\wrapper.js:16:5)
    at runWithReadCallback (C:\Users\mouazzamj058\solc_example\node_modules\solc\wrapper.js:37:42)
    at compileStandard (C:\Users\mouazzamj058\solc_example\node_modules\solc\wrapper.js:78:14)
    at Object.compileStandardWrapper (C:\Users\mouazzamj058\solc_example\node_modules\solc\wrapper.js:85:14)
    at Object.<anonymous> (C:\Users\mouazzamj058\solc_example\example.js:4:19)
    at Module._compile (module.js:652:30)
    at Object.Module._extensions..js (module.js:663:10)
    at Module.load (module.js:565:32)
    at tryModuleLoad (module.js:505:12)
    at Function.Module._load (module.js:497:3)

请帮助.

推荐答案

您正在使用哪个版本的solc?

Which version of solc are you using?

Solc前几天发布了一个破坏版本，与此错误有关.

Solc released a breaking version the other day, this error is related to that.

npm uninstall solc
npm install solc@0.4.25

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