Error: cannot estimate gas; transaction may fail or may require manual gas limit

[Clintontrillz]

Lesson

Lesson 5

Could you please leave a link to the timestamp in the video where this error occurs? (You can right click a video and "copy video URL at current time")

No response

Operating System

Windows

Describe the bug

"Error: cannot estimate gas; transaction may fail or may require manual gas limit". I keep getting this error message whenever i deploy my contract on ganache.

const ethers = require("ethers");
const fs = require("fs-extra");

async function main() {
  //http://127.0.0.1:7545

  const provider = new ethers.providers.JsonRpcProvider(
    "http://127.0.0.1:7545"
  );
  const wallet = new ethers.Wallet(
    "0xb8c18ade1aa094d70c5ad689dff011d6b50bd2472f10ec179d28ba5a0d663862",
    provider
  );
  const abi = fs.readFileSync("./SimpleStorage_sol_SimpleStorage.abi", "utf8");
  const binary = fs.readFileSync(
    "./SimpleStorage_sol_SimpleStorage.bin",
    "utf8"
  );
  const contractFactory = new ethers.ContractFactory(abi, binary, wallet);
  console.log("Deploying, Please Wait...");
  const contract = await contractFactory.deploy();
  console.log(contract);
}
main()
  .then(() => Process.exit(0))
  .catch((error) => {
    console.error(error);
    Process.exit(1);
  });

[bharathkumar369]

same error for me ...

[arturantonionunes]

Same here

[huaTJ0210]

Same here

the contents of deploy.js below ,use ethers v6

const ethers = require('ethers');
const fs = require('fs');
async function main() {
  // http://127.0.0.1:7545
  const provider = new ethers.JsonRpcProvider('http://127.0.0.1:7545');
  const wallet = new ethers.Wallet(
    '0x82076bac6facb5006dc82cff4a48065400356428fb94b8bdf23438c502228390',
    provider
  );
  const abi = fs.readFileSync('./SimpleStorage_sol_SimpleStorage.abi', 'utf8');
  const bytecode = fs.readFileSync(
    './SimpleStorage_sol_SimpleStorage.bin',
    'utf8'
  );
  const contractFactory = new ethers.ContractFactory(abi, bytecode, wallet);
  console.log('Deploying, please wait...');
 // !!! gasLimit must be add 
  const contract = await contractFactory.deploy({ gasLimit: 3000000 });
  console.log(contract);
}

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

you must make solidity version equal to solc.js ;
for example:

{
 "ethers": "^6.13.1",
  "solc": "^0.8.19"
}

pragma solidity ^0.8.19;