I just wrote smart contract function with fire event like this. And create my node.js application with following code. const express = require('express') cons
I’m building a program intended to manage multiple payments with one call. The program needs to complete the following steps: Accept a certain amount of l
I'm trying to compile my sol file, but it's giving me this error. Why am I getting this error? DeclarationError: Identifier not found or not unique. --> p
I'm coding an bep20 token and if I want to add Liquidity with pancakeswap I get the following error: ProviderError: Error: VM Exception while processing transac
I'm on a course and have run into a problem. I am trying to make a function that shows the difference in team score from the perspective of the team in the vari
I have contract this part is simply creating smart contract for NFT. At the end of the createToken() I am emitting event. // SPDX-License-Identifier: MIT OR Apa
I am using tronlink chrome extension and trying to call balanceOf method of a smart contract. I am very new to smart contract. Unable to find any solution. Plea
I wrote a smart contract that uses openzepplin ERC20 standard. I am able to deploy it using truffle and my tests work as expected. I am now trying to test part
I'm trying to invoke the following solidity function from ethersjs (it takes another contract as argument): function getReservesData(IPoolAddressesProvider prov
Macbook Pro : Monterey Intel Core i7 Brownie v1.17.2 I am learning solidity according to reference(https://www.youtube.com/watch?v=M576WGiDBdQ&t=25510s). Wh
I am getting this error: Error: Returned values aren't valid, did it run Out of Gas? You might also see this error if you are not using the correct ABI for the
I can not install package.json dependencies in my truffle project and I have tried touch.json. it's giving me errors. I have also tried truffle init, but it is
I have problem connected to python. I want to compile solidity files using python. But getting error. import json from solcx import compile_standard, inst
Good day everyone, I am working on a lottery smart contract. I am currently done with the remix VM tests and proceeded with the unit tests with JavaScript. The
I built a test solidity pure function to display a greeting message. It only returns a string "Hello User". Here is the contract code: //SPDX-License-Identifie
I deployed an ERC20/BEP20 token on binance smart chain using truffle and openzepplin. Now I want to verify this smart contract but I have some issues. $ truffle
I'm using Visual Studio Code and every time I run brownie compile I get this which takes a good while (and also I can't compile without internet connection): I
If I mint a collection of n items on my own address (via smart contract) , it'll be publicly visible on my account under the collected / created section like th
I want to create a contract that buys and sells to a fixed price which can be set with a contract interaction onlyOwner basically i need a token vendor with edi
I have a security problem in my Solidity contracts and I can't figure out how to fix it. The flow goes like this: First, we create an instance of contract A; Cr