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
Im having a simple UI where i need a metamask connect button but when i use this code i keep getting the "Non-Ethereum browser detected. You should consider try
I am trying to call a method on a Smart Contract on a node app using an account that I create from a private key using web3 on a private quorum blockchain. I am
I am trying to call a method on a Smart Contract on a node app using an account that I create from a private key using web3 on a private quorum blockchain. I am
I have a Python script using Brownie that occasionally triggers a swap on Uniswap by sending a transaction to Optimism Network. It worked well for a few days (d
I am new to block chain. Suddenly I got a question did we can able to access the previous block data from the Ethereum block chain by block number. For example
I try to install truffle on windows with npm install -g truffle as administrator. I updated node.js npm and don't know what to do next. PS C:\Windows\system32&g
I have tried to make a ERC20 token that takes a transaction fee on every transaction (buy/sell/transfer) and this transaction fee gets distributed amongst the h
I need to send ether from externally owned account to contract. All code I found so far looks like this contract Contract { mapping (address => uint) ba
I want to get the value that is inside of struct in Solidity, but I have no idea how to get it. pragma solidity >=0.4.21 <0.6.0; contract PlaceList {
I'm learning blockchain development recently and I'm implementing ERC721 contract to mint NFT and store the mapping of ownership. What if I deploy a second cont
I am learning solidity and got to know that interface and abstract are both classes that may contain unused functions. My doubt is: What is the difference betwe
In the process of developing the ethereum dapp, I tested the load and there was a nonce error. When building a rawTx, I used web3.getTransactionCount("accountAd
I want to compile my ethereum HelloWorld.sol smart contract. In all the tutorials is that you do it like this: var solc = require('solc'); var compiledContract
When I run npx hardhat console --network rinkeby accounts = await ethers.provider.listAccounts(); I get Uncaught ProviderError: Must be authenticated! with bel
I'm using nethereum & unity with infura. (I'm developing an DApp.) I wrote some code for minting new NFT, and tested, and it worked very well. However, afte
I am developing an application on Ethereum blockchain. I use Solidity for contract and Nethereum c# library to connect to the contract. I am somehow new in Ethe