I am trying to sign a manual transaction using ethereumjs-tx to interact with a smart contract.

This is how I am getting my gaslimit, nounce and data for the params

 var GAS = await cont.methods.withdraw("100000000000000000").estimateGas({from: address}, 
 function(error, estimatedGas) {
    console.log("gas limit is"+GAS);

    var nonce = await web3.eth.getTransactionCount(address);

    var hexData = await cont.methods.withdraw("100000000000000000").encodeABI();

And this is how I am declaring the params for ethTx object :

  const params = {
            nonce: nonce,
            to: contractAddress, //address of the receiver
            value: '0x000', // value in hexa format
            gasPrice: web3.utils.toHex('100'),
            gasLimit: GAS,
            chainId: 42, // 1 for main ethereum chain
            data: hexData

This is the txHash for the code after running the script txhash.

I am not sure what I am doing wrong. Please help me get into the right path. Thanks!

1 Answer 1


Even tho it shouldn't matter because it's a test net, they may not like such a low gas price of 0.0000001 Gwei. Try to replace the transaction by sending a higher gas price, maybe at least 1 Gwei

  • So doesn't web3.utils.toHex('100') means 100 Gwei?? Feb 25, 2021 at 10:06
  • 1
    It means 100 wei, which is 0.0000001 Gwei, which is 0.0000000000000001 ETH. You can convert them here: eth-converter.com
    – 3DLures
    Feb 25, 2021 at 10:28

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