What does the "insufficient funds for gas * price + value" error mean when using the EstimateGas function?

Created by Sourajyoti Gupta, Modified on Thu, 30 Nov 2023 at 07:02 PM by Sourajyoti Gupta

The "insufficient funds for gas * price + value" error typically occurs when there are not enough funds available in a wallet to cover the gas fee required for a transaction. This error message indicates that the wallet's balance is insufficient to pay for both the gas cost and the transaction value.

To estimate the gas required for a transaction before executing it, you can use the following JavaScript script as a general guideline: 

const ethers = require("ethers")
const abi = require('./abi.json')

async function main(){

    const  contractAddress =  process.env.CONTRACTADDRESS 
    const pKey = process.env.PKY
    const rpcURL = process.env.RPC
    const provider = new ethers.JsonRpcProvider(rpcURL)
    const signer = new ethers.Wallet(pKey, provider);
    const contract = new  ethers.Contract(contractAddress,abi,provider)

    const encodeFuncData =    contract.interface.encodeFunctionData("createBlog",["Hello",    "hello","url",true]) // func name and args 
    const gasEstimate = await provider.estimateGas({
        to: contract.target,
        data: encodeFuncData,

This script sets up a connection to an Ethereum node, prepares the transaction data, and then estimates the gas required for the transaction. It's a useful technique to prevent running into "insufficient funds for gas" errors when interacting with the Ethereum blockchain.

Was this article helpful?

That’s Great!

Thank you for your feedback

Sorry! We couldn't be helpful

Thank you for your feedback

Let us know how can we improve this article!

Select atleast one of the reasons
CAPTCHA verification is required.

Feedback sent

We appreciate your effort and will try to fix the article