TypeError: Cannot read properties of undefined (reading 'JsonRpcProvider')

Question

const ethers = require("ethers");

const provider = new ethers.providers.JsonRpcProvider('https://mainnet.infura.io/v3/MYKEYISHERE')

web3.eth.getBlockNumber().then(console.log)

Error:

const provider = new ethers.providers.JsonRpcProvider(`https://mainnet.infura.io/v3/MYKEYISHERE`)
                                      ^

TypeError: Cannot read properties of undefined (reading 'JsonRpcProvider')

Answer 1

Look at this post.

EthersJS Listening to events with NodeJS Strange Errors

Had the same problem few days ago, turned out to be problem with a beta release of ethers.js.

The fix for me was to downgrade "ethers" to version 5.4 in the config.json, then remove node_modules folder and lastly npm install to install ethers again.

Answer 2

The newer version of Ethers seems to be unstable ethers 6.0.2... To solve this error downgrade your ethers version to 5.7.2 by going to your package.json

"ethers": "5.7.2"

now on your cli use npm install [email protected] or yarn add [email protected] depending on your package manager and that should solve your error.

Answer 3

I am using ethers version 6.2.3, You can directly import it from ethers package.

const { ethers, JsonRpcProvider } = require('ethers');

For more info refer to this link https://github.com/ethers-io/ethers.js/issues/3924.

Entire code I am using to deploy contract locally using ethers on Ganache

//importing thers and JsonRpcProvider
const { ethers, JsonRpcProvider } = require('ethers');
const fs = require('fs-extra');
async function main() {
  // Json Rpc Provider - Connecting to local blockchain
  const provider = new JsonRpcProvider('address'); // add your rpc server url from Ganache

  // Connect to wallet to sign transactions
  const wallet = new ethers.Wallet(
    'Add your private key here',
    provider
  );

  //Read ABI which you get post compilation using solc
  const abi = fs.readFileSync('./fileName.abi', 'utf8');
  
  //Read Binary which you get post compilation using solc
  const binary = fs.readFileSync(
    './fileName.bin',
    'utf8'
  );

  //Create Contract factory object to deploy
  const contractFactory = new ethers.ContractFactory(abi, binary, wallet);
  console.log('Deploying, Please wait...');
  
  // Deploy and you are good to go
  const contract = await contractFactory.deploy();
  console.log(contract);
}

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

Response

Deploying, Please wait...
BaseContract {
  target: '0x35aD58985b61f634A8108A7ffcF6D438ab701ffB',
  interface: Interface {
    fragments: [ [FunctionFragment], [FunctionFragment], [FunctionFragment] ],
    deploy: ConstructorFragment {
      type: 'constructor',
      inputs: [],
      payable: false,
      gas: null
    },
    fallback: null,
    receive: false
  },
  runner: Wallet {
    provider: JsonRpcProvider {},
    address: '0x8EDA89abFAB838dc350c12fA8b6D9Ad630380B2f'
  },
  filters: {},
  fallback: null,
  [Symbol(_ethersInternal_contract)]: {}
}

Answer 4

Had the same problem few days ago, turned out to be problem with a beta release of ethers.js.

The fix for me was to downgrade "ethers" to version 5.4 in the package.json, then remove node_modules folder and lastly npm install to install ethers again.

1

Answer 5

I also faced the same issue, when I changed the version it worked adequately. change the version (6.0.3 to 5.7.2). The latest version is not stable.

Answer 6

I had the same problem, the problem is in the version of the ethers, so I changed the version of ethers to ^5.7.2 in package.json Then I deleted the whole folder node_modules and again installed all components

Answer 7

There are some problems in the latest ether.js version. Change the ether version to 5.4.0 in the package.json file then delete node modules and reinstall it using npm install.

Answer 8

As mentioned in the hardhat-ethers plugin docs you must install 'ethers@^5.0.0' version and it resolves the issue.

Answer 9

I think you will have to import JsonRpc provider at the beginning.

const { JsonRpcProvider } = require("ethers");

Answer 10

For this error

Cannot read properties of undefined (reading 'JsonRpcProvider')

run this command to solve this issue;

npm install --save-dev ethers@^5

or

yarn add --dev ethers@^5

Answer 11

I was facing a similar issue yesterday, what I did was to uninstall ethers and reinstall a lower version, particularly from 6.8 to 5.4.

Answer 12

simple:

npm uninstall ethers

npm install --save-dev @nomiclabs/hardhat-ethers 'ethers@^5.0.0'

In hardhat.config.js

require("@nomiclabs/hardhat-ethers");