Questions tagged [javascript]
JavaScript is a dynamic, weakly-typed language used for client-side as well as server-side scripting.
1,105
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Call to contract doesn't work when sending a merkle proof (using ethers & JS)
I basically have a contract whose mint function looks like this:
function mint(uint256 _mintAmount, bytes32[] calldata merkleProof) public payable isValidMerkleProof(merkleProof, ...
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9
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My test doesn't pass but expectation return correct value (truffle)
I have a voting Contract which contains 3 functions , 1 Struct, 1 mapping, 1 modifier and I use Ownable from openzeppelin :
struct Voter {
bool isRegistered;
bool hasVoted;
...
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1
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17
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UNIT Test Error: No Contract deployed with name Raffle
This is the section of my unit testing... I've been working on this problem for the last few hours. I couldn't, however... I think the error is in const { deployer } = await getNamedAccounts() this ...
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1
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15
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Error: chainId address mismatch
i'm trying to deploy a simple smart contract with node-js on a ganache-GUI but i keep getting this Error: chainId address mismatch;
may chainId is the same as the networkId in the ganache app witch is ...
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Does Smart Contract pay gas fees in this case?
Lets say there are 2 smart contracts A and B. A contracts approves B contract for some allowance, as B has approval to withdraw from A contract. Lets say contract B withdraw some X coins from A ...
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14
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How can I batch execute multiple Gnosis Safe transactions via js/ts?
I've been using the typescript npm libs gnosis.pm/safe-core-sdk and @gnosis.pm/safe-service-client to execute Gnosis Safe transactions one-by-one. Recently I've noticed in the web UI that one can ...
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29
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Flashloan Arbitrage error 'SafeERC20: low-level call failed'
So I finally am almost finished with my flashloan arbitrage how ever when I run it I get this error
'SafeERC20: low-level call failed'
here is my contract code
// SPDX-License-Identifier: MIT
pragma ...
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31
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web3modal error during Wallet Connect function for web3 in javascript
i try to follow github web3modal guide to con figure my wallet connect in javascript . pls help me on this issue. appreciate
https://github.com/Web3Modal/web3modal-vanilla-js-example
html
<...
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13
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Transfer multiple tokens with one confirmation in Smart chain
I want to send several tokens at the same time with a transaction in Smart Chain with the web3 DApps Trust Wallet
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erc721 was created but does not appear in wallet
I am attempting to create a Factory which mints NFTs and while it seems that my transaction has completed, metamask does not register the NFT. See the screenshots of my app: https://imgur.com/a/...
- 101
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33
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require ERC20 transferFrom
I have a deposit function where I want to require that the transferFrom worked and if not it should be reverted with "Transaction declined by user".
function deposit(uint256 _amount) ...
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How to Call Smart Contract Function After Migrations
In my 2_deploy_contracts.js file, I can successfully migrate all my contracts using the command truffle migrate. My problem is that after migration, I want to call a function from contract D and pass ...
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HardhatError: HH700: Artifact for contract "Greeter" not found
Following the instructions on Hardhat (https://hardhat.org/getting-started#installation) to deploy a smart contract on VScode.
Previously created a Hardhat project where I changed the name from ...
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The block number when you await solidity call in javascript
If I await two solidity calls in javascript sequentially:
await contract.A().call();
await contract.B().call();
does it mean they will guarantee to happen in two different blocks? Thanks.
EDIT: both ...
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How to get solidity custom errors on dApp?
I would like to get the custom error code from my dApp, however, I can't get it when the smart contract is using revert. However, I can get the error reason when the solidity contract use required.
Ex....
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Help Please ERROR in ./src/App.js 6:0-46Modulenotfound:Error:Can'tresolve'./wallet/Connector'in'/Users/user/Desktop/esample/react-minting-website/src'
Hi Please i am developing an nft project using web.js , web3React Hook , with Web3 Connector. @web3-react/injected-connector and then try compile my project with npm start i can't figure why i get ...
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[SOLVED]PatrickCollins Solidity Course 2022 - Lesson 7: 11:20:38 -> TypeError: ethers.getContract is not a function
AssertionError: Expected transaction to be reverted with You need to spend more ETH!, but other exception was thrown: Error: Transaction reverted: function returned an unexpected amount of data
I was ...
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7
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How can I add an element to the array at an index of my choosing while altering the array size accordingly?
I have an array that looks something like this:
uint256[] array = [1,2,3,4,5,6,7,8];
I am familiar with how to add an element to an array using array.push(100); which would make the array look like ...
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32
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TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray Ethers.js encrypt function error
const jsonKey = new ethers.Wallet(process.env.PRIVATE_KEY);
const encrypTkey = jsonKey.encrypt(process.env.PASSWORD);
Code is throwing error saying
**TypeError [ERR_INVALID_ARG_TYPE]: The "data&...
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1
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require("fs-extra") not working even after adding/installing fs-extra (yarn add fs-extra)
I have installed "fs-extra" using yarn add fs-extra and then importing fs-extra
const fs = require("fs-extra");
fs.readFileSync("./Abc.bin"); is not working
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How to send a "Address" from Javascript to Solidity Contract
Hi i have created frontend and working with web3js.
Now what i am trying to do is:
Updating the data in the contract.
Add the address in the contract (So here in form i am asking the user to put the ...
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2
answers
44
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Help Please Solidity version pragma statement in these files doesn't match the configured compilers in your config*contracts/hello-world.sol ("0.8.4")
Hi Please am unable to figure out why i get this error while trying to compile my interact.js script using npx hardhat run scripts/interact.js --network ropsten
on vs code : Error HH606: The project ...
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16
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TypeError: Cannot read properties of undefined (reading 'toNumber')
I'm receiving type error please help
Test.js code
const { expect } = require("chai");
const toWei = (num) => ethers.utils.parseEther(num.toString())
const fromWei = (num) => ethers....
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2
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18
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TypeError: transactionResponse.wait is not a function ethers.js
I have a contract object. on top of it I am calling store() function.
const transactionResponse = contract.store("4");
const txReceipt = transactionResponse.wait(1);
Getting Below Error:
...
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2
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30
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window is not defined when used with next.js
I am trying to write a React-next.js app. I have the following file that exports an instance of Web3 by passing in window.ethereum to the constructor.
import Web3 from 'web3';
const web3 = new Web3(...
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1
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12
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Not able to use "connect()" method to sign transactions with different account in HARDHAT
I am making a smart contract so that I can send messages and other addresses can also send messages in that contract. So the message, block.timestamp and the sender's address will be stored in an &...
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how to call this sc function throught ether js and define pid amount while calling it
function mintpid(address _to, uint256 _mintAmount, uint256 _pid) public payable {
TokenInfo storage tokens = AllowedCrypto[_pid];
IERC20 paytoken;
paytoken = tokens.paytoken;
...
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2
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35
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Is there a way to retrieve hexadecimal methodID from function ABI?
I am making a simple decompiler but i'm struggling with encoding my functions to signatures. For instance I have function "transfer(address recipient, uint256 amount)" which I want to encode ...
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31
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Gas estimation reverts
I am quite new to blockchain programming and am trying to estimate the gas cost of calling a function from a smart contract.
I am using Web3 js and the Kovan network through an Infura node.
What am I ...
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1
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How to write the javascript test code on whether a smart contract function is successfully executed or not?
I wrote a lottery smart contract and gonna to test an "enter" functionality of the smart contract.
The below code is javascript test code for the "enter" function of the smart ...
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43
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console.log not working in scripts/deploy.js and in smart_contract in HardHat
console.log not working in scripts/deploy.js and contracts/WavePortal.sol in Hardhat. When I run the command npx hardhat run scripts/deploy.js it only shows "" Compiled 1 Solidity file ...
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Error: /api/v0/object has been removed, use /api/v0/dag instead
I am using ipfs for image upload in my form it was working fine but from few days back it's giving me the error.
the following is my code.
uploaddoc: function(){
const reader = new FileReader();
...
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7
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I am trying to run my project on rinkeby test net and trying to use it as a default provider but whenever i try my project id is missing in rpc url
this is the code. project id is missing after the https://rinkeby.infura.io/v3/. i am new to this technology. i hope anyone to help me out.
const sdk =new ThirdwebSDK(
new ethers.Wallet(
process.env....
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18
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Problem with eth.sendRawTransaction in geth console
Im trying to use the following code with nodejs to create a raw transaction:
const ethTx = require('ethereumjs-tx').Transaction;
const txParams = {
nonce: '0x0',
gasPrice: '0x3B9ACA00',
...
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I am trying to build a marketplace and I wanna get all the assets of the suer so I can work with them and make sales etc
As said in the title I wanna build a marketplace. I will need to get all the assets.
Yesterday I was visting some marketplaces and they were able to make a signature request
that allowed them to get ...
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1
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36
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How to get value from key in a map, where the key is an adress?
Im a bit struggling with all the datatypes in solidity so i hope someone can help me out.
I created a map where i can store a specific adress + value(number) trough a public function. Now i am writing ...
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1
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20
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Ethereum metamask payment on website not working
im trying to integrate a metamask ethereum payment button on my website but nothing happens when the button is pressed, any help with this? This is the script i got
window.addEventListener('load', ...
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How to print current Metamask account balance in console.log/HTML
I am trying to print the balance of the current Metamask account in my localhost web app, but in the console log it says
Uncaught (in promise) TypeError: Cannot read properties of undefined (...
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error:Expected private key to be an Uint8Array with length 32
var Tx= require('ethereumjs-tx').Transaction
const Web3=require('web3')
const web3= new Web3('HTTP://127.0.0.1:7545')
const account1='0x06e61BDdC2a45A7523C62c0DcC4E15D842BBa9BA'
const account2='...
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1
answer
41
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Gnosis Transaction Failing On Polygon w/ "Transaction Underpriced" error
I've been trying to get a transaction to execute on Polygon but it's been failing with the following error:
reason: 'processing response error',
code: 'SERVER_ERROR',
body: '{"jsonrpc":...
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2
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80
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TypeError: Cannot read property 'length' of undefined - While deploying using hardhat
I am getting the following error while trying to deploy a Mock contract on the hardhat development chain.
I am following:
Learn Blockchain, Solidity, and Full Stack Web3 Development with JavaScript – ...
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1
answer
74
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Ethers.js signing a message to validate EOA is who they say they are
When you use dApps that have read/write functions that require auth, sometimes the dApp will have you sign a message to prove you are the EOA you claim to be. OpenSea does this when you want to modify ...
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16
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How To Read All Specific Data
I wrote a smart contract that saves data to the blockchain and is able to return read that data when you enter a specific id. The problem is I would also like to save the data by date but when I enter ...
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21
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Requesting code review for simple EIP712 validation scheme
Hello,
I am working on a simple EIP712 whitelist member wallet registration/validation scheme. The nutshell goes (sign typed data -> pass to chain -> extract signing address -> compare to ...
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20
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How to integrated javascript /web 3 into wordpress?
hello everyone i use wordpress for website developement and right now i developping a web3 app and i would to know how can i integrated the script to wordpress element (button etc ).
Should i develop ...
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1
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10
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im trying to call the bid function on my bidding contract from an outside contract but im getting "undeclared identifier" error... please help
Smart contract code:
interface IERC721 {
function safeTransferFrom(
address from,
address to,
uint tokenId
) external;
function transferFrom(
address,
...
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1
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25
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Unable to deposit into AAVEv3 via web3
I'm attempting to deposit WMATIC on the Polygon chain into AAVEv3, but I'm getting a revert.
I'm running a forked version of Polygon mainnet locally with ganache. I'm using the first account provided ...
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0
answers
38
views
Uncaught (in promise) TypeError: myFunction.watch is not a function
I'm trying to develop my first DAPP based on this tutorial (https://livebook.manning.com/book/building-ethereum-dapps/chapter-12/) and I'm encountering some errors in the javascript part. In ...
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0
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44
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Getting "Expected private key to be an Uint8Array with length 32" when running a transfer function on ropsten testnet through my terminal
i am trying to send a transaction but it throws an error.
MY CODE:
var Tx = require('ethereumjs-tx').Transaction
const Web3 = require('web3')
const web3 = new Web3('https://ropsten.infura.io/v3/...
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0
answers
22
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How to estimate gas Price using Ethers.js prior to sending the transaction?
I am trying to estimate gas using ethers. I have tried using await this.signer.getGasPrice() but this doesn't take into account my contract's function and my address.I saw that on ethers's ...
