Ethers js set noonce when using contract object

Question

I use ethers to interact with solidity contract. I would like to execute multiple transactions at the same time. To do that I know I have to define noonce that would be +1 for each next transaction. I know how to do that when I do

await signer.sendTransaction()

but how can I execute multiple transactions with custom noonce when I create Contract object and execute function on it? I tried

contract.methodName(methodParams, {
      gasLimit: gasLimit,
      gasPrice,
      value: ethers.utils.parseEther(
        "0.01"
      ),
      noonce: nextNoonce
    })

but it doesn't work and I get error cannot override "noonce". How can I define it here?

Answer 1

To get new nonce every time use getNonce() function

  const nonce = await wallet.getNonce();

Complete Code

const { ethers, JsonRpcProvider } = require('ethers');
const fs = require('fs-extra');
async function main() {
  const provider = new JsonRpcProvider('http://127.0.0.1:7545');

  const wallet = new ethers.Wallet(
    'Your private key here',
    provider
  );

 
  const nonce = await wallet.getNonce();
  const txn = {
    nonce,
    gasPrice: 20000000000,
    gasLimit: 1000000,
    to: null,
    value: 0,
    data: '0xpaste binary here',
    chainId: 1337, //Change this chain Id, I am using Ganache
  };
  const sentTxnResponse = await wallet.sendTransaction(txn);
  console.log(sentTxnResponse);
}

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

Note : I am using ethers version 6.2.3