I'm trying to import some contract files from open zeppelin so my solidity smart contracts can inherit their functionality, when trying to write chai tests that
I want to deploy my own ERC-20 token on different blockchains, so is there any possibility to deploy the same token contract on different blockchains. If we do
2_deploy_contracts.js ===================== Replacing 'SimpleStorage' ------------------------- Error [ERR_UNHANDLED_ERROR]: Unhandled error. ({ code:
I playing Ethernaut Level 8. The goal is to get access to the private password state variable and unlock the contract. I know one could use await contract.unloc
I am a newbie in smart contract development. I just create a smart contract for some analyze how it works, so I used the truffle suite with vs code to create a
I'm trying to write some data to Ethereum Rinkeby test network without using meta mask, But while calling the method i'm getting the error below , But my argume
I'm currently developing a dApp in Solidity and am working on a web3 library to handle communication with it. I struggle with the process of new account creati
I’m wanting to use Metamask in my app to let users pay a fixed ETH fee (plus gas) to call a method from my Solidity contract. I looked at the Metamask doc
I am a newbie in the blockchain technology and I have question. I just deployed an Ethereum smart contract to the Rinkeby testnet network and minted a few NFTs.
pragma solidity ^0.8.4; import "hardhat/console.sol"; contract Ewitter{ struct User{ address wallet; string name; string username;
Hi I am doing BSC DApp using web3 with react. I am very new to this field. I found after call approve, the transfer(or zapInToken in my case) will not be succes
I am trying to do the following calculation with solidity: 3,000 / 45,000,000 = 0.000067 with the following method: // SPDX-License-Identifier: MIT pragma solid
I'm building a decentralized application where users can connect their cryptocurrency wallet (Metamask) to my website. They can initiate a connection request by
I want to know how to get a list of all existing erc20 tokens in the ethereum blockchain. Because I want to get a list of all coins what a users holds in his wa
I've been told that signing a message on a Dapp is the only way to prove that you actually own the account you are connecting with (i.e., simply connecting your
This is my first experience writing a smart contract, so I am still trying to navigate how this all works. I have a smart contract on the Rinkeby test network t
I wonder if it is possible to see "Output Data" on Etherscan for non-view transactions that returned values, I mean it is possible to see "Input Data" when fetc
I am trying to call Uniswap's Router's function swapExactTokensForETHSupportingFeeOnTransferTokens(). When I enter the values manually on etherscan, it goes thr
My contract for ERC1155 marketplace to mint buy and sell the NFT. The nft is getting minted , However the NFT is not showing in market place and not able to pur
Why is the gas fee not working? If I remove the gas fee, the transaction works. But if I add a gas fee, the transaction fails and returns error: {'code': -32000