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Java合约部署到精通网络，并且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'

为纠正这一点，我添加了

node: {
    fs: "empty"
    },

到我的webpack.config.js文件。 此后，我能够成功编译项目并启动服务器，但是在浏览器中打开项目时，未部署合同，并且在控制台中出现以下错误：

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，我发现前端不应该使用fs，因此有人建议我用它代替。但是在这里，它被Aion节点模块使用，而不是直接使用，因此我似乎找不到解决方法。

Answer 1

正如您所提到的，fs是服务器端模块，可以将文件上载（通过react或任何客户端模块）到服务器，并在服务器端执行，并将响应返回给客户端。

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，假设您正在部署反样本合同（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

问题在这里得到解决：

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

由于无法在客户端上使用fs，因此我在客户端上进行其余交互时，在服务器端的MERN dApp中转移了部署功能。