通过前端部署 Aion dApp 时出错：fs.readFileSync 不是函数

Question

我正在使用 MERN 堆栈应用程序通过前端将我的 java 合约部署到 Mastery 网络，并在编译时遇到以下错误：

Module not found: Error: Can't resolve 'fs' in '/home/parina/Documents/aion-counter/node_modules/aion-web3-eth/src'

为了纠正这个问题，我添加了

node: {
    fs: "empty"
    },

到我的 webpack.config.js 文件。在此之后，我成功地编译了我的项目并启动了服务器，但是在浏览器中打开项目时，合约没有部署，我在控制台中收到以下错误：

TypeError: fs.readFileSync is not a function at Contract.deploy (index.js?60f4:244) at _callee$ (Main.js?1523:40) at tryCatch (runtime.js?280d:65) at Generator.invoke [as _invoke] (runtime.js?280d:303) at Generator.prototype.<computed> [as next] (runtime.js?280d:117) at step (Main.js?1523:9) at eval (Main.js?1523:9) at new Promise (<anonymous>) at eval (Main.js?1523:9) at deploy (Main.js?1523:19)

在各种论坛上搜索后，我发现 fs 不应该用在前端，有人建议我使用它的替代品。但它在这里被 Aion 节点模块使用，而不是直接使用，因此我似乎无法找到解决它的方法。

Answer 1

正如你提到的，fs 是一个 server-side 模块，文件可以上传（通过 react 或任何客户端模块）到服务器并执行 server-side 并将响应返回到客户.

所以我建议获取 jar 的编码字节码以及部署参数，并将交易数据字段设置为编码数据。

例如，假设您正在部署计数器示例合约(https://docs.aion.network/docs/deploy-a-contract#section-example-script)：

let data = 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    const Tx = {
        from: "Your address",
        data: data,
        gasPrice: 10000000000,
        gas: 5000000,
        type: '0x2' //AVM java contract deployment
    };

这可以是您的交易对象。

Answer 2

问题已在此处解决：

https://github.com/aionnetwork/aion_web3/issues/78#issuecomment-513938605

由于无法在客户端使用 fs，我将 MERN dApp 中的部署功能转移到服务器端，同时在客户端进行其余交互。

通过前端部署 Aion dApp 时出错：fs.readFileSync 不是函数

Error while deploying Aion dApp through frontend : fs.readFileSync is not a function

aion