Lesson 5|| <ref *1> Error: cannot estimate gas; transaction may fail or may require manual gas limit(ganache)

[zafi5]

I have tried Existing suggestion still show the same Error
deploy.js file

const ethers = require("ethers");
const fs = require("fs-extra");
require("dotenv").config();

async function main() {
  const provider = new ethers.providers.JsonRpcProvider(process.env.RPC_URL);
  const wallet = new ethers.Wallet(process.env.PRIVATE_KEY, 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, Plz wait...");
  const contract = await contractFactory.deploy();
  console.log(contract);
  await contract.deployTransaction.wait(1);


  const currentFavouriteNumber = await contract.retrive();
  console.log(`current favourite number: ${currentFavouriteNumber.toString()}`);
}
main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });



.env file

PRIVATE_KEY=0xe48dc90d8c8a6effaa31cce659c84ca0c59ca46c2142d68eda4efdabe81cfe1e
RPC_URL=http://127.0.0.1:7545

package.json

{
  "dependencies": {
    "dotenv": "^16.3.1",
    "ethers": "5.7.2",
    "fs-extra": "^11.2.0",
    "solc": "^0.8.23-fixed"
  },
  "scripts": {
    "compile": "yarn solcjs --bin --abi --include-path node_modules/ --base-path . -o . SimpleStorage.sol "
  }
}

[varunpareek690]

You can try giving the ganache Gas limit as a parameter in this line

const contract = await contractFactory.deploy({ gasLimit: 6721975 });

[Gboly]

Hi Zafiqul,

Been 2months you asked this question, so i'm assuming you figured it out already but I'm replying for other users seeking a solution.

Just like @PatrickAlphaC used in his course, the 0.8.7 solidity version and 0.8.7-fixed solc version would be the solution to this problem. Install this version of solc and update the solidity version to 0.8.7.

Apparently, fixed versions of solc doesn't generate this error. I have no idea why but that's the situation currently.

You could also try version 0.8.14-fixed.