TypeError: ethers.getContract不是一个函数

Question

我会寻找一个替代，但不能使用以太模块将使我疯狂的道路。代码是从帕特里克的坚实Javascript课程，NFT部分，第14课复制的。

下面的代码应该在我点击console.log(“-”)行之后，将模拟部署到hardhat的本地ganache链中，并打印出图像位置。

02-deploy-random-ipfs.js

const { network, ethers } = require("hardhat");
const { developmentChains, networkConfig } = require("../helper-hardhat-config");
const { verify } = require("../utils/verify");
const { storeImages } = require("../utils/uploadToPinata");

const imagesLocation = "./images/randomNft";

module.exports = async function ({ getNamedAccounts, deployments }) {
    
    const { deploy, log } = deployments;
    const { deployer } = await getNamedAccounts();
    const chainId = network.config.chainId;


    // get IPFS hashes of images
    let tokenUris;

    if (process.env.UPLOAD_TO_PINATA == "true") {
        tokenUris = await handleTokenUris();
    }

    let vrfCoordinatorV2Address, subscriptionId; 
    if (developmentChains.includes(network.name)) {
        //const vrfCoordinatorV2Mock = await deployments.get("VRFCoordinatorV2Mock"); // works
        const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock"); /**ERROR**/
        
        vrfCoordinatorV2Address = vrfCoordinatorV2Mock.address;
        const tx = await vrfCoordinatorV2Mock.createSubscription();
        const txReceipt = await tx.wait(1);
        subscriptionId = txReceipt.events[0].args.subId;
    } else {
        vrfCoordinatorV2Address = networkConfig[chainId].vrfCoordinatorV2;
        subscriptionId = networkConfig[chainId].subscriptionId;
    }

    console.log("------------------------------");
    await storeImages(imagesLocation);

    // const args = [
    //     vrfCoordinatorV2Address,
    //     subscriptionId,
    //     networkConfig[chainId].gasLane,
    //     networkConfig[chainId].callbackGasLimit,
    //     //tokenUris,
    //     networkConfig[chainId].mintFee,
    // ];
}

async function handleTokenUris() {
    tokenUris = [];
    // store image in IPFS
    // store metadata in IPFS

    return tokenUris
}

module.exports.tags = ["all", "randomipfs", "main", "02"];

堆栈跟踪：

Error: ERROR processing /Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/deploy/02-deploy-random-ipfs.js:
TypeError: ethers.getContract is not a function
    at Object.module.exports [as func] (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/deploy/02-deploy-random-ipfs.js:25:51)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at DeploymentsManager.executeDeployScripts (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1220:22)
    at DeploymentsManager.runDeploy (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1053:5)
    at SimpleTaskDefinition.action (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:422:5)
    at Environment._runTaskDefinition (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
    at Environment.run (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
    at SimpleTaskDefinition.action (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:568:32)
    at Environment._runTaskDefinition (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
    at Environment.run (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
    at DeploymentsManager.executeDeployScripts (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1223:19)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at DeploymentsManager.runDeploy (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1053:5)
    at SimpleTaskDefinition.action (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:422:5)
    at Environment._runTaskDefinition (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
    at Environment.run (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
    at SimpleTaskDefinition.action (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:568:32)
    at Environment._runTaskDefinition (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
    at Environment.run (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
    at SimpleTaskDefinition.action (/Users/user/Documents/Programs/link/hh-fcc/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:653:5)

package.json

{
  "devDependencies": {
    "@chainlink/contracts": "^0.5.1",
    "@nomiclabs/hardhat-ethers": "npm:hardhat-deploy-ethers",
    "@nomiclabs/hardhat-etherscan": "^3.1.2",
    "@nomiclabs/hardhat-waffle": "^2.0.3",
    "@openzeppelin/contracts": "^4.8.0",
    "@pinata/sdk": "^2.1.0",
    "chai": "^4.3.7",
    "dotenv": "^16.0.3",
    "ethereum-waffle": "^3.4.4",
    "ethers": "5.5.4",
    "hardhat": "^2.12.2",
    "hardhat-contract-sizer": "^2.6.1",
    "hardhat-deploy": "0.10.5",
    "hardhat-gas-reporter": "^1.0.9",
    "prettier-plugin-solidity": "^1.0.0-rc.1",
    "solhint": "^3.3.7",
    "solidity-coverage": "^0.8.2"
  },
  "dependencies": {}
}

我在这个问题上看到了一些问题，其中发现模块之间存在冲突，但它们的解决方案不起作用。

这是因为我试图删除我的node_modules文件夹，并从yarn install重新安装从来自github的package.json，但仍然没有骰子。有什么建议吗？

Answer 1

我在任何地方都能认出那个部署脚本。这就是我从帕特里克身上学到的，就像你一样，我也遇到了这个问题。这是一个安全帽问题，您需要安装作为别名的安全帽部署-以太，并强制下载硬帽子-华夫饼。

执行以下操作:首先通过添加以下行来安装安全帽-部署-醚

 "@nomiclabs/hardhat-ethers": "npm:hardhat-deploy-ethers@^0.3.0-beta.10"

到你的package.json，那么

npm i

去安装。下一次力量硬帽华夫饼使用

npm install -D @nomiclabs/hardhat-waffle --force

您完成了，getContract就变成了一个函数。使用解决方案会有所帮助，但是Patrick经常使用部署脚本，您也会想要使用它。关于"getContractAt“的工作是很棒的，但是当我只是运行没有部署的脚本时，我主要使用它。你也会意识到这一点，跟随帕特里克，所以你可能会得到解决错误，并完成它。Ps保存此页面，您很可能再次遇到错误。

要获得更多的清晰性，请参见Wighawag的解释这里

Answer 2

如果其他解决方案根本不起作用，您可以尝试实现这个解决方案，而不是使用ethers.getContract()，结果应该是相同的：

 await deployments.fixture(["MyContract"]);

 const myContract = await deployments.get("MyContract");

 const contract = await ethers.getContractAt(
      myContract.abi,
      myContract.address
    );
  });