Questions tagged [gas]
Gas is a 'sub-currency' which enables the EVM and Ethereum's decentralised computer to run -- with each operation, an amount of gas (proportional to the computational effort required to perform the operation) is consumed.
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Are storage variables tightly packed like struct fields?
Tight variable packing is a known coding pattern in Solidity for saving gas by placing struct fields that are lower than 256 bits closer to one another.
Does this logic apply to storage variables? ...
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How does Gelato's Relay service work? How is it possible for another wallet to send my signed transaction (matching sender address) and pay gas?
How does Gelato's Relay service (used by gnosis safe relayer) work? How is it possible for another wallet to send my signed transaction (matching sender address) and pay gas? Does it require Gnosis to ...
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Why don't ETH transfers cost more when the recipient's balance is zero?
The SSTORE opcode has differential pricing depending on what the original, current, and new storage values are (see EIP-2200 for the full details). In short, the idea is that setting a zero value to a ...
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Remove the element from array where order matters?
I am presenting my use case here. Let's think of a dating app where each candidate enters their preferences and we store their data and add them to an array. when someone enters that matches with any ...
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Why is Transaction Value showing 0 ETH on Etherscan?
I'm not sure why the transaction value on Etherscan is showing as 0 ETH when the transaction was confirmed.
According to the recipient, they haven't received anything in their wallet either and I'm ...
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Read from a state variable without sending a transaction
https://solidity-by-example.org/state-variables/
the site says "you can read state variables, for free, without any transaction fee". But when I do a get - call in Remix, a transaction is ...
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Eth::Client::ContractExecutionError - transaction underpriced
I am using the eth gem ruby library
https://q9f.github.io/eth.rb/
to execute a function called from the ABI but it keeps getting the error transaction underpriced. I assume that it has something to do ...
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how pay network fee for many accounts
i have crypto pay getaway in my application And we only receive Tether on the (Ethereum and BSC and Tron) networks
The application creates a wallet address for each user
0x123...User1 (Only USDT ERC-...
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Optimizing Gas Costs in Solidity Smart Contracts: Best Practices?
I'm working on a Solidity smart contract and I'm concerned about the gas costs associated with its execution. I want to optimize my contract for gas efficiency to save on transaction fees and improve ...
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How can I avoid out of gas on multiple eth transfers when looping addresses?
Hello everyone good day,
I'm working on an automated eth distribution function that sends eth to all the nft holders of a determined collection (using ERC721A as standard for the nfts), it works well ...
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Significant gas cost difference between store data in initial variable and change data
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.8.10;
// when SAVE == address(0) call setSave execution cost 22622 gas
// when SAVE != address(0) call setSave execution cost 5522 gas
...
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What is the purpose of (success); after a call?
I'm looking through the EIP-4337 account abstract sample repository and am not sure what the purpose of (success); is in the following function.
function _payPrefund(uint256 missingAccountFunds) ...
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Gas cost on mapping
I'm reading docs on Venom and they said that the problem on using mapping in ERC20 contract is "Now let's imagine that we have an erc-20 like mem-token contract with one large hashmap of token ...
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Transaction fails due to: Insufficient funds for gas * price + value
I am trying to make transactions on Polygon Mainnet, but unfortunately when I automatically try to calculate the transaction fees, the transaction gets reverted because I assume that the fees are to ...
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Can I make a contract call to refund the unused gas fee to a specific address instead of the msg.sender?
Can I make a contract call to refund the unused gas fee to a specific address instead of the msg.sender? I want to use this as a means of charging fees for my project.
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Understanding the Inner Workings of eth_estimateGas in Smart Contracts
I'm seeking clarification on how the eth_estimateGas function operates under the hood. Does it run the smart contract in a manner similar to a dry run?
When I make a call to eth_estimateGas, and I've ...
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Is there anyway to reduce gas fee for uniswap v3 ExactOutputSingleParams?
Question is simple. Is there anyway to reduce gas fee for ExactOutputSingleParams ?
function swapExactOutputSingle(uint256 amountOut, uint256 amountInMaximum) external returns (uint256 amountIn) {
...
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How to estimate gas cost to update uint256?
I have a need to update a uint256 state variable in a solidity contract that was deployed with a proxy. When calling the function to update the variable programmatically with Ethers, the total cost is ...
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How to catch the {'code': -32000, 'message': 'gas required exceeds allowance (0)'} exception in we3.py?
I'm using the estimate_gas method to get the gas estimate for the tx that I'm sending and in case balance < gas estimate I wanna trow an exception.
try:
gas_estimate = self.w3.eth.e(...
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Where do arbitrum gas fees go?
Similar question to here except, based on the arbitrum docs:
⚠️ Note: There is no protocol level incentive to run an Arbitum full node.
I know the sequencer gets paid some amount of the fee, but I ...
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Reduce gas price?
I'm working on a sniping bot on uniswap, and i have a little problem : the first ones to buy are those who pay the most. Pretty logical, but I don't really want to pay 300$ in priority gas to be the ...
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Simple function causing very high gas fees solidity
Hello everyone i just recently dpeloyed my first main net contract.
Now on solidity and locally all the fees looked good and it was quite minimal. I have this function which creates a bet and just ...
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Web3.py: 'intrinsic gas too low', how to select gasPrice and gas?
In previous question on the forum this issue was already discussed, but it does not address another one: how to select gas and gasPrice so that you wouldn't bet all wallet's money and transaction ...
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Execution Error - ERC20: Transfer Amount Exceeds Balance in Ethereum Smart Contract
I'm encountering a perplexing issue while working on an Ethereum smart contract. It seems to be a parameter related error, but I haven't been able to rectify it. The following error message is ...
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unpredictable gas limit error doesn't go away after setting gasLimit manually
I have this contract which is written in solidity and one of the functions (getMyActivity()) returns an array of structs and im trying to call it from my frontend which is written in ReactJS but i get ...
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`gas` vs. `gasLimit` fields
I am trying to submit a transaction with a gas limit set. In the documentation, I find a field referred to as gasLimit with the following description
gasLimit – the maximum amount of gas units that ...
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How to populate large integer arrays in Solidity?
I'm currently building an NFT fantasy league game on ethereum where I want to add the functionality of on demand minting of random tokens. For that I need to keep track of the tokens that are ...
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How to correctly specify maxPriorityFeePerGas?
I am trying to send a transaction quickly by adding a priority fee that is half the base fee with the following logic:
const { baseFeePerGas } = await client.getBlock();
const priorityFee = ...
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Why does my transaction not start with full gas?
Im trying to optimize the gas costs of my smart contract, and noticed a large chunk called "Initial gas" in the tenderly debugger. Upon digging further, I confirmed that the function call ...
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How much does it cost to clog the Ethereum Network exactly?
Currently the largest gas guzzler to clog the Ethereum network is the Mint contract below. Supposedly there are users purposely causing high gas prices using this function. Why would anyone do this ...
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Set the correct spender when calling gasless transferFrom from another contract with GSN
Actually I'm trying to figure out the best way to implement gasless call to transferFrom of a ERC-20 token.
I'm not very familiar with GSN so maybe it could be a best way to achieve this.
I wrote a ...
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What is the recommended gas limit when minting NFTs on Ethereum?
I was trying to mint 70 NFTs at once and I set a limit of 8,700,000 but ran out of gas (wasted $300). What is the max limit we should set?
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BSC Testnet and ETH Testnet, I want to copy/fork a contract in eth which is evermoon, but I always get an error with the gas and it always fails
This is the error it gives me, can you help me fix this problem, I adjust the gas limit, it started from 3000000, to 30000000, but still the transaction failed. I tried in bsc testnet using ...
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Smart Contract runs 1-2 times then runs out of gas afterwards
I am creating a smart contract that will mint new trading card NFTs, for some reason the minting contract can only run 1-2 times before encountering (what I presume is) a runtime error and using up ...
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Efficient techniques for updating common fields in multiple smart contracts with minimized gas fees
I have multiple smart contracts that share a common structure, each containing two fields: destination and owner, which hold the same values. I would like to update the destination or owner values for ...
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Which of <= and < comparison operators use less gas in Solidity?
if(num <= 10) revert();
And
if(num < 11) revert();
Which of these statements consume less gas?
If we could save gas, we need not use less than/greater than equal to. We can just use less than ...
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Why is remix giving me gas estimation errors when I am sending more gas than the transaction needs?
I am running a contract in remix and only my getBalance() function is working. Specifically my requestFlashLoan, approveUSDC, and approveDAI are all failing due to gas. I sent the transaction even ...
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How to fix gas issue
Contract address: 0x2138fF6dB5125F68E69152679D340c09d09eDEF0
USDC token address goerli: 0x9FD21bE27A2B059a288229361E2fA632D8D2d074
I sent USDC to the contract which I can see it when I invoke the &...
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EIP-1559 transaction classification on etherscan
I am wondering how I can detect the type of transaction submitted on Ethereum based on EIP-1559 adopted or not.
Thank you
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Buying ethereum on Metamask or Coinbase
What is the cheapest way to buy ethereum? Straight through metamask or through coinbase and then transfer it to metamask?
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revert statement causes infinite gas estimation in Remix
I wrote an Ownable contract snippet that uses revert instead of require on the OnlyOwner modifier. This causes remix to estimate infinite gas fees.
Does anyone know why?
// SPDX-License-Identifier: ...
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Does ERC-4337 require an update to the network?
My understanding was that we needed to update the network so that contracts can sign transactions and messages, and so that contracts can be called with just a secret key or other auth methods, rather ...
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Fantom cannot approve spending USDC token
I am doing simple approve operation on USDC token in Fantom network.
Here is my payload:
functionParams {
from: '0xd775b00b5cf6e954aed8408202367a1bae6ac55f',
to: '...
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Who pays for the L1 gas costs of ZK-rollups?
I have deployed the same smart contract on both the Goerli Testnet and the Polygon zkEVM Testnet. When I execute the same interaction, it costs the same amount of gas on both networks (as expected), ...
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ERC 20 Remix Gas Allowance ERROR
I have this basic contract made on Openzeppelin Wizard, but everytime I try to deploy it on Mainnet i get the same error " exceeds gas allowance". I succesfully deployed it on Goerli. I've ...
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How to empty a wallet after the London Upgrade?
Is it possible to empty an account after the London upgrade and if yes, how?
If I understand it correctly, I have to pay BaseFee + FeeTip and I know that a simple TX would consume exactly 21000 Gas. ...
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Can EOA accounts interact with ERC-4337 paymasters?
My question is rather simple.
Can an EOA account pay some coins using ERC-4337 paymasters without having to pay gas fee itself?
Is there any way, having access to an EOA private keys, to withdraw ...
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Editing genesis file in geth Clique
I'm working on project using the geth clique.
I have 4 nodes running on the network.
I created the 5th node with:
geth --datadir node5 account new
I have edited the genesis.json to add the account ...
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Prioritize Ethereum Transaction
What would be a good strategy to prioritize a transaction given the EIP-1559 definitions:
Base Fee: minimum fee a transaction must pay to be a valid transaction. The Base Fee changes per block, ...
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Why ETH gas fee is still expensive >$5 - $10 after sharding + POS?
I just notice that ETH charges $40 for a tx at the time POW + high demand
$5-$10 at the time POW + avg low demand
And $5-$10 at the time POS + low demand (current 2023)
So can you explain more why the ...
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