Search Question & Answer for ethereum code - 9codings

Grabbing transaction fee for a list of transaction hashes

May 26, 2023

Using MATIC with Web3 and MetaMask: "Error: Returned error: unknown account"

May 24, 2023

Geth node not finding peers with Zedboard

May 23, 2023

What's preventing the Ethereum blockchain to getting to big too fast

May 19, 2023

How to subscribe to Multiple Eth addresses on USDT token transfer events

May 17, 2023

How to keep wallet connected on page refresh using UseEffect

May 12, 2023

The entire Ethercan API call being printed in Flutter

May 11, 2023

* Invalid account: #0 for network: mumbai - Expected string, received undefined

May 11, 2023

chainlink: how to deploy an Operator with v0.8?

May 10, 2023

Solang - panicked at 'type not allowed'

May 9, 2023

Invalid signature error from ethers when trying to verify a signature

May 7, 2023

How to verify that a transaction hash is included in a block's transactionsRoot on chain?

May 7, 2023

Solidity: Disable Buying and Selling if CurrentPrice is below LastTransactionPrice?

May 5, 2023

Getting error Erc721 : operator Query for non existent token

April 25, 2023

Create two different instances of ERC-721 in the same smart contract

April 17, 2023

Error "VirtualMachineError: revert: Fallback not allowed" when executing "weth.balanceOf(flashloan)"

April 15, 2023

How are ERC 721 based DAO created?

April 11, 2023

Setting initial supply for factory contract generated token

April 9, 2023

Uniswap v3. Is it better solution?

April 1, 2023

Solidity: decode byte data into two structs

March 31, 2023

Getting error Transaction does not exist/is not available when not adding sginer to wallet via web3.eth.accounts.privateKeyToAccount()?

March 31, 2023

How fix TypeError and DeclarationError with ChainLink Solidity smart contract?

March 30, 2023

ERC20 atomic swap in solidity

March 28, 2023

How to use conditionals with modifiers?

March 28, 2023

My brownie won't install. it's telling me "Microsoft Visual C++ v14.0 or more required" i have installed a new vs studio redist 2017 c++ package

March 27, 2023

Which address is paying the gas fee? And, can the smart contract pay the gas fee by itself?

March 26, 2023

Why does the deployment of smart contracts on the private Ethereum blockchain need to consume gas fee, while the invocation does not?

March 24, 2023

Problem push values to an enum array in a struct

March 22, 2023

Cannot switch signers with ethers.js for a contract interaction using Hardhat

March 22, 2023

Simple swapExactInputSingle from Uniswap V3 fails on Rinkeby

March 19, 2023