How much gas is required to deploy a contract?

[airbone42]

Hi,

I've built a very basic ERC-20 token with open zepplin and deployed that already several times using ethers v5 without issues to Rinkeby.

So, finally I wanted to deploy that as well to Mainnet and have put some ETH into a wallet. Unfortunately, this always ends up in the error "Insufficient funds for intrinsic transaction cost."

Is there any way to find out how much ETH in the wallet would be required to deploy the contract?

Best,
Tobias.

[zemse]

Is there any way to find out how much ETH in the wallet would be required to deploy the contract?

Whenever you make a transaction, the Insufficient funds check sees that the signer of the transaction should at least have gasPrice * gasLimit amount of ETH. (A deploy contract transaction is also a transaction with some gasLimit and gasPrice).

So you need to know how much gas does your deploy tx consumes, if you've tried it on Rinkeby, similar gas (or exact in most cases) would be needed for mainnet. An example of a ERC20 token deploy contract: this costs 1,311,213 gas. So if I am deploying this contract to mainnet, amount of ETH is dependent on the gwei gas price that would be put. Considering fees are 100 gwei. Then ETH that the deploying wallet should already have is:

100 gwei * 1311213 gas = 100 * 10^(-9) * 1311213 = 0.1311213 ETH

[ngocanhth]

I don't understand my problem declared with private key of wallet with 18 ETH on rikeby but it still gives error when deploy
reason: 'insufficient funds for intrinsic transaction cost',
code: 'INSUFFICIENT_FUNDS',

[zemse]

18 ETH is pretty enough for deploying any contract on rinkeby

• Can you check if you are passing huge gasPrice? Passing 10 gwei should be enough (ethers.utils.parseUnits('10', 'gwei')).
• Can you confirm if the wallet you are deploying from the correct wallet (console.log(wallet.address) before the deploy line to check).

[aryanjiyani]

Well, if you have deployed your contract in test network then you will be able to see gas usage per transaction so note it down.
And then go to this site
https://etherscan.io/gastracker

Observe the Gwei price and multiply it with your noted number which is the actual Gas price which would applicable in ethereum mainnet in the format of "Gwei"

Also you can convert it in ETH through this website
https://eth-converter.com/