如何在安全帽中使用以太得到已部署合同的ABI？

Question

我必须用json格式的部署最新ABI更新我的前端文件。我在部署脚本中使用以下代码(在部署原始智能契约之后运行)

import { DeployFunction } from "hardhat-deploy/types";
import { HardhatRuntimeEnvironment } from "hardhat/types";
import fs from "fs";


const updateUI: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
    const { network, ethers } = hre;
    
    console.log("Writing to front end...");
    
    //Updating ABI on front end JSON file
    const frontEndAbiFile = "path/to/store/abi.json";
    const fundme = await ethers.getContract("FundMe"); //already deployed contract on hardhat/rinkeby
    //I want to get the ABI here so that I can write and save it to frontEndAbiFile location.
    fs.writeFileSync(frontEndAbiFile, 'How shoud I get ABI in json?' );
    
};

export default updateUI;

我怎样才能得到json格式的FundMe合同中的ABI？请阅读我以上代码中的评论。注意:我使用的是TypeScript。

Answer 1

如果您是通过命令行进行部署，则可以从以前构建的文件中读取，在“硬帽子”的情况下，有一个示例：

const fs = require("fs")
const path = require("path")

const getTheAbi = () => {
  try {
    const dir = path.resolve(
      __dirname,
      "./artifacts/contracts/HelloWorld.sol/HelloWorld.json"
    )
    const file = fs.readFileSync(dir, "utf8")
    const json = JSON.parse(file)
    const abi = json.abi
    console.log(`abi`, abi)

    return abi
  } catch (e) {
    console.log(`e`, e)
  }
}

Answer 2

可以跳过ABI直接获得合同实例：

const contractInstance = await ethers.getContractAt("contracts/XYZ.sol:ContractName", contractAddress);

Answer 3

fs.writeFileSync(
    frontEndAbiFile,

    fundme.interface.format(ethers.utils.FormatTypes.json)
)

部署时，这将更新前端文件。