SyntaxError: Unexpected token \'?\' in upgrade smart contract using @openzeppelin/hardhat-upgrades答案

【问题标题】：SyntaxError: Unexpected token '?' in upgrading smart contract using @openzeppelin/hardhat-upgradesSyntaxError: Unexpected token \'?\' in upgrade smart contract using @openzeppelin/hardhat-upgrades
【发布时间】：2022-08-23 11:30:19
【问题描述】：

我正在尝试在多边形孟买测试网上部署可升级的智能合约。我收到此错误

smart-contract/node_modules/@openzeppelin/hardhat-upgrades/dist/index.js:108
        compiler.settings ?? (compiler.settings = {});
                           ^

SyntaxError: Unexpected token \'?\'
    at wrapSafe (internal/modules/cjs/loader.js:915:16)
    at Module._compile (internal/modules/cjs/loader.js:963:27)
    at Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Object.require.extensions.<computed> [as .js] (/Users/jagdish/workspace/speedrun-simple-nft-example/smart-contract/node_modules/ts-node/src/index.ts:1587:43)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/Users/jagdish/workspace/speedrun-simple-nft-example/smart-contract/hardhat.config.ts:4:1)
    at Module._compile (internal/modules/cjs/loader.js:999:30)

在尝试运行部署脚本时。

这是我的配置和部署脚本：

hardhart.config.ts

import { task } from \"hardhat/config\";
// import \"@nomiclabs/hardhat-waffle\";
import \'hardhat-watcher\';
import \'@openzeppelin/hardhat-upgrades\';
import \'@nomiclabs/hardhat-ethers\';
import dotenv from \"dotenv\"
dotenv.config()


// This is a sample Hardhat task. To learn how to create your own go to
// https://hardhat.org/guides/create-task.html
task(\"accounts\", \"Prints the list of accounts\", async (taskArgs, hre) => {
  const accounts = await hre.ethers.getSigners();

  for (const account of accounts) {
    console.log(account.address);
  }
});

// You need to export an object to set up your config
// Go to https://hardhat.org/config/ to learn more

/**
 * @type import(\'hardhat/config\').HardhatUserConfig
 */
module.exports = {
  solidity: \"0.8.4\",
  watcher: {
    compilation: {
      tasks: [\'compile\'],
    },
    node: {
      tasks: [\'node\'],
    },
  },
  networks: {
    matic: {
      url: \"https://polygon-rpc.com/\",
      accounts: [process.env.ACCOUNT_PRIVATE_KEY]
    },
    matic_mumbai: {
      url: \"https://rpc-mumbai.maticvigil.com\",
      accounts: [process.env.ACCOUNT_PRIVATE_KEY]
    }
  }
};

部署.ts

import { ethers, upgrades } from \"hardhat\";

async function main() {
  const contract = await ethers.getContractFactory(\"YourCollectible\");
  console.log(\"Deploying Contract ...\");
  const c = await upgrades.deployProxy(contract, { constructorArgs: [\"Your Collectables\", \"YCB\"] })
  // const c = await contract.deploy(\"Your Collectable\", \"YCB\");

  await c.deployed();

  console.log(\"Contract deployed to:\", c.address);
}

main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });

包.json

{
  \"name\": \"smart-contract\",
  \"version\": \"1.0.0\",
  \"description\": \"\",
  \"main\": \"index.js\",
  \"scripts\": {
    \"run\": \"hardhat compile\",
    \"test\": \"echo \\\"Error: no test specified\\\" && exit 1\"
  },
  \"keywords\": [],
  \"author\": \"\",
  \"license\": \"ISC\",
  \"devDependencies\": {
    \"@nomiclabs/hardhat-ethers\": \"^2.0.6\",
    \"@nomiclabs/hardhat-waffle\": \"^2.0.3\",
    \"@openzeppelin/hardhat-upgrades\": \"^1.20.0\",
    \"@typechain/hardhat\": \"^6.1.2\",
    \"chai\": \"^4.3.6\",
    \"ethereum-waffle\": \"^3.4.4\",
    \"ethers\": \"^5.6.9\",
    \"hardhat\": \"^2.9.9\",
    \"hardhat-watcher\": \"^2.3.0\",
    \"ts-node\": \"^10.8.1\",
    \"typescript\": \"^4.7.4\"
  },
  \"dependencies\": {
    \"@openzeppelin/contracts\": \"^4.7.0\",
    \"dotenv\": \"^16.0.1\"
  }
}

我不确定这是我本地的节点版本问题还是我必须降级 @openzeppelin/hardhat-upgrades 版本（我已经尝试过了）。节点版本：v12.22.10 任何人都可以帮忙吗

标签： blockchain ethereum smartcontracts hardhat openzeppelin

【解决方案1】：

我在节点 12 上遇到了同样的问题。更新到节点 16 并再次运行 yarn 后问题解决了。

【讨论】：