Questions tagged [gas-estimate]
The gas-estimate tag has no usage guidance.
134
questions with no upvoted or accepted answers
6
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0
answers
101
views
Deploy gas issue for require reason string
I found a strange case and didn't find out why.
...
modifier onlyMaster() {
require(msg.sender == master || msg.sender == developer, "caller is not the master");
_;
}
...
...
- 126
5
votes
1
answer
811
views
Can't debug transactions that fail during the Web3.js estimateGas() call? No Tx Hash
NOTE: I am doing my work with the Ganache v1.2.2 GUI client on a Linux Ubuntu 18.04 station.
There are many revert errors that happen during the estimateGas() call that precedes the actual Web3.js ...
- 831
4
votes
0
answers
194
views
Does 'estimateGas' behave the same on Ganache and on mainnet?
I noticed that estimateGas behavior in Ganache has changed:
In version 6.4.1, it throws an exception if exceeding the gas-limit.
In version 6.5.1, it returns the estimation even if exceeding the gas-...
- 25.7k
4
votes
1
answer
193
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Testrpc transactions are failing. How do I perform a transaction when Mist cannot estimate gas?
I am attempting to perform transactions and create contracts using EthereumJS Testrpc. I set it up by running the following:
Terminal 1: testrpc
Terminal 2: mist --rpc localhost:8545
Running both ...
user5135
3
votes
0
answers
43
views
Elegant way to purposefully charge more gas in a smart contract
I am trying to run tests to see how much a smart contract will cost, but since I am in my research period, I have to make some assumptions on how my smart contract will be developed. I would like to ...
- 489
3
votes
0
answers
216
views
Does brownie have functionality to analyze gas costs for all function calls?
Does brownie have any sort of functionality that gives a breakdown of the cost to deploy all contracts and execute all function calls within a brownie project with min, max and average gas cost ...
- 1,054
3
votes
1
answer
1k
views
Ethers and Web3-React: Cannot estimate gas when trying to connect with contracts deployed on testnet and using Alchemy as node provider
I'm trying to connect with contracts deployed on the Rinkeby testnet using a node provider. When I was testing using hardhat as a local node, the contracts are called with no problem, but when I ...
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3
votes
2
answers
3k
views
Constantly getting "Gas estimation failed" error when attempting to deploy ERC20 Token contract on Rinkeby testnet
I have included the code for the contract below. The error I get when attempting to deploy in remix via metamask is:
Gas estimation errored with the following message (see below). The transaction ...
- 696
2
votes
0
answers
24
views
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 ...
- 121
2
votes
0
answers
23
views
What values for the global state variables does geth use for estimateGas?
What values for the global state variables does geth use for estimateGas?
For example, block.timestamp.
- 21
2
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0
answers
390
views
Is gasleft() the best way to manage big loops in solidity?
I'm developing an Smart Contract that has to iterate through an undetermined size list of ERC20 tokens, and make a swap for each token. I'm aware that you cannot loop an undetermined size list, ...
- 1,631
2
votes
1
answer
2k
views
Automated gas cost calculation in Hardhat?
Context
I've learned from this question that it is not (always) possible to compute the gas-costs of an arbitrary solidity contract a.sol because the amount of computation that it takes may depend on ...
- 65
2
votes
1
answer
179
views
How estimateGas works internally?
I am building a sniper bot which continually estimating the gas for buying one token. Once the gas is successfully estimated, a transaction to buy the token is sent. But for many times it estimated ...
- 41
2
votes
1
answer
782
views
gas fee on OpenSea
First, I'm brand new to the Ethereum platform, so I do apologise if any of the following is considered stupid questions. Now, I will ask my question anyway
I am setting up the first sale of one of my ...
2
votes
0
answers
121
views
how to estimate the gas cost of a contract function that will fail
I am trying to estimate the gas cost of a contract function that will fail. when i do that using standard web3.py's contract.function(args).estimateGas(txArgs) it ends up failing and raising an ...
- 3,050
2
votes
0
answers
155
views
What Web3JS method do I call to know what value to use for the gas price with sendSignedTransaction?
I am using Web3JS 1.0+ to send transactions to my smart contract.
I've been using the following constant for the gas price in my code that I got a long time ago from a tutorial. What is the "...
- 831
2
votes
1
answer
68
views
Why use different gas?
I have this contract with this functions, why each use different gas amount?
pragma solidity 0.4.24;
contract Foo {
//transaction cost: 21471 gas
//execution cost: 199 gas
//total cost: 21670 ...
- 321
2
votes
0
answers
245
views
Gas cost of adding an item to a class-level (storage) array
I would like to make sure that the gas cost of adding an item to a (storage) array is constant, i.e., not dependent on the length of the array.
To my understanding, the relevant EVM operation is ...
- 25.7k
2
votes
1
answer
498
views
Alternative solution for loops in subscription smart contract design
I am a new developer, working on a smart contract mostly for my own learning. I am developing a Smart Contract to handle subscriptions. The contract has the below features.
Subscribers can subscribe ...
- 21
2
votes
1
answer
224
views
Can the behaviour of the Ropsten Test net be compared to that of the main net?
can be assumed, that a contract behaves in the same way on the Ropsten Test test as well as on the main net, in terms of gas consumption for example?
(I think, that the gas price might be different?)
...
- 168
2
votes
0
answers
302
views
Calculating Gas Remaining at Specific Point in Execution of Contract
This is a doozy :~)
I'm trying to figure out the amount of gas remaining in some contract at some specific step. For example:
function hash(uint num) returns (bytes32) {
return sha3(num, msg....
- 770
2
votes
0
answers
629
views
Why is there a difference between eth.estimateGas and the real cost in testRPC?
When I want to deploy a smart contract, I use the eth.estimateGas before deploying my smart contract. This gave me 688180 Gas.
let bytecode = compiledContract.contracts['Document'].bytecode;
let ...
- 1,478
2
votes
0
answers
147
views
Populus cannot deploy contract related to estimated gas is not enough error
I am using populus.
Platform darwin -- Python 2.7.12, pytest-3.0.2, py-1.4.31,
pluggy-0.3.1
Plugins: populus-1.1.0
OS: Mac OS X
I do face with following error: for the following line on my test.py ...
- 8,298
1
vote
2
answers
51
views
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 ...
- 195
1
vote
1
answer
625
views
Estimate Gas from a smart contract on polygon with ethers
I deployed a smart contract on polygon mainnet and want to estiamte gas costs before calling the function. This is my smart contract:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import &...
- 21
1
vote
1
answer
41
views
Gas cost of mapping operations
Suppose, your contract has something like
if (_balances[account] >= someNumber) {
_balances[account] = _balances[account] - _balances[account]/10;
}
What is the gas cost of this operation? I ...
- 111
1
vote
2
answers
31
views
Predict future gas price
I am wondering, is there a way to "predict" future gas prices? I would like to find a gas price or at least approximation of it for the future block, so the one that is currently pending.
- 33
1
vote
0
answers
25
views
Complex factory optimization
After two and a half years of developing smart contracts on a non-EVM blockchain (Tezos), I started working on a few solidity projects, and I'm trying to understand some things.
I built a factory ...
- 36
1
vote
0
answers
225
views
estimateGas with prerequisites (gas estimation requires approvals first)
I am trying to estimateGas for an Ethereum transaction with ethers signer.estimateGas(). This transaction should execute several trades on arbitrary DEXs.
To execute the transaction approvals of ERC-...
1
vote
0
answers
28
views
Deterministic gas use
In ether, any pure ether transfer will always cost 21000 gas.
However, due to the nature of the MPT used in the Balances tree, wouldn't some addresses have more layers of the tree to hop through and ...
- 11
1
vote
0
answers
16
views
NodeJs or Python libraries for estimating the gas costs
I am looking for libraries in Python or NodeJs which can provide gas cost estimations like the one provided by Hardhat. Please share knowledge you have regarding this..
- 11
1
vote
0
answers
379
views
Gas estimation failed error
Following error is coming:
Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?
execution reverted { "...
- 19
1
vote
0
answers
189
views
Low level question about how eth_estimateGas interacts with state changes
i'm new here, i have a pretty weird question.
Do you guys know how eth_estimateGas works at low level? In particular, do you guys know how it interacts with state changes?
Let's say for example i have ...
- 11
1
vote
0
answers
213
views
getting error while calling getrandomnumber in my smart contract
error message: Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?
execution reverted { "originalError": {...
1
vote
0
answers
80
views
Maximum gas estimate
eth_estimateGas provides estimated final gas consumed by transaction and accounts for gas refund in the end of transaction. However, is there a way to estimate maximum gas the transaction may consume ...
- 131
1
vote
0
answers
682
views
How does web3.eth.estimateGas work?
I have tested two situations using "web3.eth.estimateGas" to estimate the gas cost of contract transaction.
First one is to get contract by the address of a deployed contract and estimate ...
- 113
1
vote
0
answers
485
views
Ethersjs estimateGas bypassing insufficient funds
I am using ethersjs to call my contract methods. The problem stems from trying to making the Metamask popup despite the account has insufficient funds in the first place. I am trying to do the popup ...
- 11
1
vote
1
answer
173
views
estimate gas usage for a contract
I'm trying to estimate the gas usage for a smart contract for an NFT token - is it possible to do before the actual sale?
contract is already published and all functions as well.
so I want to know how ...
- 41
1
vote
1
answer
18
views
why did this transfer transaction fail on eth?
https://etherscan.io/tx/0x8ad822a326243e69c4d5bcd3fe07466a82c2c00edbc53cbc0a211c6efbdd7dd2
checked ethgasstation and doubled the gas but it still failed, any ideas why it would?
- 11
1
vote
1
answer
420
views
Estimated Gas in JS Doesn't Match Metamask Gas Fee
I need help with figuring out the estimated gas for an approval. I'm able to get a number but it doesn't match what's in metamask. I'm a noob to web3 and so I'm not even sure I'm passing the correct ...
- 131
1
vote
0
answers
1k
views
Hardhat estimatedGas error on smart contract deployment
I'm getting the following error when trying to deploy to BSC testnet:
Hardhat Error: cannot estimate gas; transaction may fail or may require manual gas limit (error={"name":"...
- 11
1
vote
1
answer
198
views
Discrepancy in gas prices in ENS
I'm a bit confused, I'm trying to buy a domain name in https://ens.domains/ and the price is extremely high for a domain name, it's about $150. Most of that price comes from gas fees. The confusing ...
- 113
1
vote
1
answer
87
views
Are named returns more expensive?
Say I have the following Smart Contract:
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.7;
contract Test {
function f1(uint256 a, uint256 b) external pure returns(uint256) {
...
1
vote
0
answers
405
views
Understanding eth_estimateGas with regards to gas price, and current mempool
Does anyone have a detailed understanding of how eth_estimateGas works with regards to gasPrice and the current mempool state?
I have historically seen some really odd behavior when using ...
- 640
1
vote
0
answers
166
views
Execution erorr: Invalid opcode on estimateGas | Possible unhandled promise rejection
pragma solidity ^0.5.0;
I get invalid opcode error when trying to estimate gas needed for my transaction from react-native using the following line of code:
const gasAmount = await contract.methods
...
- 11
1
vote
1
answer
235
views
gas estimate in loop
I have two contract. I call function placeBid in other contract and i have warning gas estimation. help me. thanks. Can i call function which use gas in loop through other contract? How i can get ...
- 61
1
vote
0
answers
490
views
Gas estimation errored with the following message (see below). The transaction execution will likely fail
When I try to excute the deposit function it shows Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?
execution ...
- 11
1
vote
0
answers
295
views
Is there a way to calculate gas usage of external function call?
I have an external view function which has an iteration loop. If the contract's totalSupply gets bigger, then the iteration time will grow as well. I'm testing on rinkeby right now, but when I launch ...
- 191
1
vote
0
answers
46
views
function gas calculator and function gas padding
not sure if this is possible, but I was wondering if one function can calculate the gas cost of another function?
Also can a function run a series of computations to match the gas cost of the ...
- 27
1
vote
0
answers
65
views
Vyper OPCODES gas estimate at compile time
I am trying to dissect Vyper at lower levels to understand how the gas estimates are generated. I tried following the yellow paper and I searched every single line of the compiler but I can't get it ...
- 11