Questions tagged [ethereumjs]
For questions regarding the installation or use of EthereumJS, a Javascript library that implements a number of Ethereum utility functions.
754
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9
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My test isn't working and I'm having a lot of issue
const { expect } = require('chai');
const { ethers } = require('hardhat');
const tokens = (n) => {
return ethers.parseUnits(n.toString(), 'ether')
}
describe('Token', ()=> {
let token, ...
- 1
0
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0
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14
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Strange order of transactions in the same block
recently i saw next thing:
There is a nft game contract, the goal is to be the first (top 100).
Each game starts by Tx from admin, let's say he calls start() function in his transaction.
Then all ...
- 1
1
vote
1
answer
10
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How to ensure only physical Smart Meters can update blockchain data?
Hey fellow blockchain enthusiasts!
I'm working on a project where I need to ensure that only physical smart meters can update the data on a blockchain-based Smart Contract. It's crucial to prevent ...
- 11
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0
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18
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Right wat to execute sendSignedTransaction with web3 v4.2.0
I am using [email protected]. I am trying to implement the sendSignedTransaction method, but it keeps on giving me below error.
reason: 'err: insufficient funds for gas * price + value:
I am sure I do have ...
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0
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24
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I keep getting error when trying to send transaction signed by web3.eth.sign with web3.eth.sendsignedtransaction
I get an error
Error: TypedTransaction with ID 40 unknown at t.TransactionFactory.fromSerializedData
HERE IS MY CODE:
const txData = { nonce: "0x" + parseInt(nonce, 10).toString(16), from: ...
1
vote
1
answer
33
views
Is there a way that we can mint native coin more in ethereum?
I mean if i have my own private evm chain. the intial supply for it is, assumingly, 10000 coins. after starting the blockchain can I create more coins for that.
Like minting and burning works for ...
- 11
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1
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25
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Deployed a contract using Remix need to access the abi and function whie developing frontend
I have deployed one of my contracts using remix, I have also used the oppenzeplin imports, and while trying to verify I could not cause it could not detect the imports. So I went with making a front ...
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1
answer
33
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Ethereum Gas fee model
I am trying to understand EIP 1559 Gas fee model.
I understand that the transaction fee is calculated as (Block base fee per gas + Max priority fee) * Gas used. So it means that we paid this much to ...
0
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2
answers
61
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provide steps to deploy this contract from solidity by example
When i tried deploying this contract using 10 ethers, and then providing :
claimPayment()
-> amount - 9000000000000000000 i.e 9 ethers
-> nonce - 123
-> signature - ...
- 25
1
vote
1
answer
79
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How do I hide or mask the sending address when sending tokens or eth
I am trying to build a crypto payment gateway. But when users initiate a withdrawal to credit their customers, the transaction can be tracked up to the point that shows the system address where the ...
- 82
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1
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40
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are there other ways to send bundle of transactions without using flashbot?
I am wondering if there are some ways to send bundle of transactions without using flashbot?
I am not sure how this area works,
would you please give me practical sources to learn ?
- 313
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1
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27
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Dose contracts must be deployed?
I see js programmers compile and call solidity contract without actually deploying it using hardhat and/or similar tools. Do they really can use the contract without deploying on the chain(like swap ...
- 69
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votes
1
answer
4
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Ethereumjs putContractStorage throws an error
I'm experimenting with Ethereumjs and having issues with the putContractStorage from vm.stateManager.
The following code snippet:
const { VM } = require('@ethereumjs/vm')
const vm1 = new VM()
const ...
- 111
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0
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15
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Where can the ProviderRpcError type be imported from?
I am creating a WalletConnect function in typescript and React.
I want to process when window.ethereum.request returns an error, but I can't directly reference the error as being an unknown type.
It ...
- 1
1
vote
1
answer
27
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Call sendSignedTransaction without waiting for result (execute in background)
My Vue.js code with web3.js:
function dreamOn() {
await web3.eth.sendSignedTransaction(txFin);
return;
}
I want to send this transaction, but I don't want to wait for the result of ...
- 11
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0
answers
37
views
Error when Importing Web3 in React: Module not found for './formats' and
I'm encountering an issue while trying to import the Web3 library in a React project. The error message I'm receiving is:
Module not found: Error: Can't resolve './formats' in '/Users/kaustubhsharma/...
2
votes
2
answers
431
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How to decode universal router of uniswap
How can I decode the exacute function going through:
"0x3fc91a3afd70395cd496c647d5a6cc9d4b2b7fad" router
Etherscan decodes the data as follows:
0 commands bytes 0x0b08
1 inputs ...
0
votes
0
answers
14
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Live Price monitor
How does dexscreener or dextools websites keep up with the price changes efficiently on thousands of tokens? Can anyone provide a sample code for that? if not, then a roadmap of steps to be taken, ...
- 101
1
vote
0
answers
18
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i want see level db
I am a beginner studying blockchain in Korea. Recently, I completed 100% synchronization of the goerli testnet using geth as my client. I want to visualize the chaindata/.sst files.
Also, I am curious ...
- 11
0
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1
answer
25
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why we use ternary operator instead of if else statement
pragma solidity ^0.8.17;
// contract AgeVerifier{
// function checkEligibility(uint256 _age) public pure returns (bool) {
// if ( _age >=18 ) {
// return true;
// } else {
// return false;
// ...
- 1
3
votes
3
answers
255
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I found a transaction that the maxFeePerGas is equal to maxPriorityFeePerGas on Etherscan
I know the maxFeePerGas = baseFeePerGas + maxPriorityFeePerGas in EIP-1559.
But I found this transaction.
https://etherscan.io/tx/0xe753607fff85bb9298b90d4dc3357c92d82add1f9a09b48c348fdd7e97a68cd2
I ...
- 31
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0
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46
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how to handle eth and wei together in ethers.js
suppose I have the function to send multiple amount's at once from an array but each value is uncertain or unknown:
let value = [0,0.87,9.5,0.342,0.66,8]
let valueInWei;
for(let i =0;i<value.length;...
- 51
0
votes
1
answer
12
views
Sign in with Ethereum through a CLI
I have a ts-node backend and I would like to use [Sign In With Ethereum] (https://login.xyz/) to connect user's wallet through a CLI. The user passes his private key as a parameter.
- 31
1
vote
1
answer
368
views
How to access Sepolia from front-end
I have created a contract and want to now connect my front-end using Sepolia.
I cannot figure out the right way to connect to the host and start my Dapp. I am using Yarn to run the Dapp.
window....
- 525
0
votes
0
answers
203
views
Unable to get the Read data or write data using Wagmi sh
So here is the react code and its a simple Counter program. Deployed on the below address.
I have put both the solidity part as well as React code
// SPDX-License-Identifier: MIT
contract ...
0
votes
2
answers
56
views
How to Call a Function only on Every New Block Mined
I have deployed a contract on the Mumbai Testnet, and it includes a function called "transfer". I would like to call this function automatically on every new block mined. Essentially, I want ...
0
votes
1
answer
95
views
Uniswap V3 Active Liquidity Provision
I am trying out different strategies for UniSwap active liquidity management. I have been reading different articles on the best strategy and the most popular one seems to be using Bollinger Band.
I ...
0
votes
2
answers
831
views
TypeError: Cannot read properties of undefined (reading 'map')
Hello Everyone Here is my next js code actually I try to fetch the event data from smart contract but when I mapping the data this error is occur TypeError: Cannot read properties of undefined (...
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1
vote
1
answer
122
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implementing chart like Dextool's chart for my react.js application
I'm gonna implement chart into my react.js application.
Chart method should be similar to dextools. Now I try to use GraphQL to retrieve all trading histories. And also I'm gonna use OHLC react chart ...
- 128
0
votes
1
answer
58
views
How to query a contract function via Etherscan's API with uint256 input?
I'm trying to query this contract:
0x992678ad242230Dd795107Fee8B572E27083002A
and to get the "getglobalStakedTokensPerPeriod" (number 11)
with the unit456 of 1 (period 1)
I've tried to use ...
1
vote
1
answer
24
views
Smart Contract Testing of Crowd Funding
Hi Iam new in solidity program i don't know how to test the donate function can anybody help me how to test?
Actually I want to test when some donate the donater balance is minus and the person who ...
- 11
3
votes
2
answers
437
views
Where to store IPFS hash other than infura.io without paying
I used infura.io to store IPFS hash few months ago in my Ethereum dapp based on React JS but now it's not free anymore and it is asking for my bank account details. I want to use it for small personal ...
0
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0
answers
33
views
JsonRpcProvider RPC call results wrong while BrowserProvider works well
I'm facing really weird phemomenon..
What Im doing is, Im instantiating Wallet with my private key,
and trying to send ERC-20 methods to endpoint ('https://ethereum.publicnode.com')
const provider = ...
- 33
0
votes
2
answers
74
views
How to know total value of buying and selling of a wallet via web3
I want to know how much a wallet has bought and sold the assets. I need to know it in dollars. For example, 500$ of assets bought and sold by a wallet
Something like this is possible in web3?
- 289
0
votes
1
answer
31
views
How to get total assets value in dollars of a wallet via web3?
I want to check the total assets value in dollars of a wallet.
For example, I just want to check how much asset (Ethers, erc20 tokens) does a wallet hold in form of dollars? e.g: 2000$ worth of assets ...
- 289
2
votes
1
answer
108
views
Stuck at looking for peers when I setup full ethereum node in Ubuntu
I am trying to install a full Ethereum 1.0 node on Ubuntu, but I keep encountering an issue. I have tried synchronizing the local time and turning off the firewall, and my computer resources are more ...
- 175
1
vote
1
answer
257
views
How to test a function that returns array type struct using Foundry
I'm a beginner with Solidity, and I'm working on a smart contract that mints an NFT and stores relevant information inside a struct. The issue I'm currently facing is that when testing the ...
- 301
0
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0
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15
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Current tick falling outside of position's lower and upper tick
I would like some assistance on this matter: My pool of reference is ETH/USDC and if my current tick is below my position’s lower tick, am I right to state that all of my position ETH will be ...
- 11
0
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0
answers
50
views
Calculate amount of ETH and USDC after minting a position in uniswap v3
I would love help in this aspect as I am a novice:
Backdrop:
UNISWAP V3 ETH/USDC pool
Current tick of 202,690
Position upper tick of 203,000
Position lower tick of 202, 000
Position value in USDC of ...
- 11
0
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0
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15
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Building an ethereum based identity system
Okay, I am still new to the web3 space, written a couple of smart contracts so far, but i want to take on a mid-sized project on building a decentralized identity management system on Ethereum Network,...
- 1
1
vote
0
answers
67
views
How to let client side sign the transaction and send it to blockchain
This mint function is giving me this error
Uncaught (in promise) Error: Returned error: transaction could not be decoded: unsupported transaction type
And if I use ethereum-js/tx module to serialize ...
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0
votes
2
answers
2k
views
We were not able to estimate gas. There might be an error in the contract and this transaction may fail
I cannot add a candidate as it shows there is an error in the contract, but the code does not show any error.
**// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0 <0.9.0;
contract Election{...
0
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0
answers
133
views
Error: cannot override "to" (operation="overrides", overrides=["to"], code=UNSUPPORTED_OPERATION, version=contracts/5.6.2)
I'm facing this error while I'm trying to mint with sending transaction
const tx = {
from: accounts[0],
to: ContractAddress,
value:...
1
vote
1
answer
311
views
ReferenceError: providers is not defined [Getting the following error when i am trying to use Ether.js to get block number]
var url = 'https://mainnet.infura.io/v3/<my-api-key>';
var customHttpProvider = new ethers.providers.JsonRpcProvider(url);
async function displayblock()
{
var block = await providers....
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0
answers
75
views
Is it possible to use flashloan as liquidity provider?
I am reading about flash loans where I come over a use case of flash loan as providing liquidity to DEXs.
I am bit confused here. How we can earn profits by just providing liquidity to DEXs since we ...
0
votes
0
answers
18
views
Error during calling testCallfoo function using .call() keyword
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
contract Receiver {
event Received(address caller, uint amount, string message);
fallback() external payable {
emit Received(...
1
vote
0
answers
19
views
TypeError: Cannot read property ':kyc' of undefined
node init.js
/home/root/init.js:16
abiDefinition = JSON.parse(contract.contracts[':kyc'].interface);
^
TypeError: Cannot read property ':kyc' of ...
2
votes
0
answers
70
views
Can’t remove liquidity on uniswap [closed]
I’m having issue removing my lp from uniswap 0xbeF4fB0BE483c74667aB6Fb5f3C1fCdc7b4eC073
Please help check the contract out
0
votes
0
answers
66
views
ethereumjs dump state like geth evm
I'm trying to get a state dump in ethereumjs library after running some EVM op codes just like it's in geth's EVM:
dev@dev-desktop:~$ geth.evm --dump --code 00 run
{
"root": "...
- 1
0
votes
2
answers
194
views
Is profitable direct arbitrage impossible with getAmountsOut?
I’ve run the math on a uniswap v2 arbitrage trade that looks more or less like this:
1) Buy X amount of token1 with Y amount of token0 on Uniswap
2) Sell equivalent amount of token1 in exchange for ...
