In Remix Rinkeby Network, I have built 2 contracts in the same folder: GetETHUSD.sol: to retrieve eth/usd exchange rate Send_2_SC: send wei to this contract an
hope all is well. I have been following Dapp University tutorial (https://www.youtube.com/embed/x-6ruqmNS3o?start=2111) to make a mintable NFT pairs game. I am
I try solidity. I import some required files but now I see Error: not found IERC20.sol But I don´t know why, because this file is next... Thank you for re
I'm Solidity Newbie. I'm learning how to implement Transparent Proxy using Openzeppelin's TransparentUpgradeableProxy contract, but am having some problems. Ste
I'm currently building a ERC721 compliant contract and have published the contract here: https://ropsten.etherscan.io/address/0xa513bc0a0d3af384fefcd8bbc1cc0c97
I've got a piece of code below that attempts to implement a two-player game (with a wager on the line) of Tic-Tac-Toe, also known as Noughts and Crosses. It is
I've been following a tutorial for the past couple of days and I keep getting this error. todoList = await TodoList.deployed() My contract is migrated to the
I npm installed everything, yet only web3 is not working? Is this a bug or is there an alternative to this solution? import React,{useEffect, useState}from 're
I Need to Write a Smart Contract, In This Smart Contract User Can Send Token to Each Account in ERC-20 Network. sender :0x5C2879Ec550e2F65D557b540B7DEAB3A6d478d
Suppose I have a contract ... pub struct Contract { collection_a: Vector<String>, } After I deploy this version, when I change the data structure of my
Here is my use case I have a smart contract that emit an event . I am new to chainlink , so my question if someone know how I can track that event history with
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 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
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'm struggling with the trasferFrom method of my standad ERC20 contract. I'm working with web3.js and INFURA I have wallet1 with 50 token allowance, now if I ca
I have been written a smart contract, I am trying to execute the following code but I have these problems: 1- "Gas requirement of function EKM.register_PK is in
When I run the command yarn build:release i get the error "command not found: asb" enter image description here
I want to connect a Solana wallet (phantom or any other) to a web aplication through the js web3 library. I've read docs for most wallets and it seems like it's
I want to automate my staking on The Sandbox. For that I need in the first step to interact with the mSand-Matic Pool Contract. It is this one: https://polygons
My environment is : Python 3.9.9 Pytest 6.2.5 Brownie 1.17.1 I'm working on the test_fund_me.py from Patrick Collins' Smart Contract tutorial on Youtube; at thi