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Ethereum : Recent Questions and Answers (Page 18)

Find answers to your questions about Ethereum or help others by answering their Ethereum questions.

What is a active wallet vs inactive

In Apr. empower had an airdrop that they said only wallets that had .1 ETH. would get it. Was that the customary requirement in Jan when the crypto blockchain was...

Asked on 08/26/2021 by Doug Cutler

1 answer

Deployed Smart contract methods are not updating the value when restart the geth instance.Why?

Started Geth using following commandgeth --identity "testpvtnode" --rpc --rpcport "8545" --rpccorsdomain "*" --datadir <pvtnetdatapath> --port "30303" --rpcapi db,eth,net,web3,personal --networkid 123 console 2>> LogfileAccessing the deployed contract through an UI...

Asked on 08/26/2021 by Pt.AR

1 answer

How return variable from simple smart contract

Hello I'm trying to make my first and simple test for get a variable from my first contract: Truffle version: Truffle v4.1.14Node: 8.12.0pragma solidity ^0.4.4;contract SimpleContract {...

Asked on 08/26/2021 by LorenzoBerti

1 answer

Transaction mined but state variables aren't changing

I am able to get the transaction with a block number while calling method of a contract however the state variables don't change unless I mention the "address" and "gas"...

Asked on 08/26/2021 by anibis

1 answer

Performance Analysis of Ethereum Clients Geth and Parity

I want to do performance analysis of Geth and Parity. I want to run 1000 transactions serially on each client and want to get transaction processing time for each transaction....

Asked on 08/26/2021 by Satish Ganta

1 answer

Modify number of confirmations

By default there are 24 confirmations but I am running a testnet with just 3 miners and I would like to change this number bucause it makes not sense to...

Asked on 08/26/2021 by sapiensapiens

2 answer

ganache-cli: how to persist new created accounts

I start my service by:ganache-cli -d --gasPrice 0 -q --db=./dbThis persists my 10 defaults created accounts, but when I create new accounts using Web3:web3.eth.personal.newAccount('password')All the created accounts desapears...

Asked on 08/26/2021 by KQUEIROZ

2 answer

Error when testing the contract

ApprovalContract.sol pragma solidity ^0.5.1; contract ApprovalContract{ address public sender; address payable public reciever; address public constant approver=0xe05cE3f89b5Ab28d6d2Ac8A503473Cd5A23e616a;...

Asked on 08/26/2021 by neha agarwal

1 answer

How to have ecrecover return nothing ? I means which value for malformed input?

I have a contract where the hash value is also the key to unlock the money. As the full ecrecover parameters are fetched from transaction parameters, and it was compiled...

Asked on 08/26/2021 by user2284570

1 answer

How to Keccak 256 hash in front end JavaScript before passing it to my smart contract

I would like to build a simple JavaScript (JS) front end that checks if a field submitted is the pre-image of a keccak256 hash I already know in my smart...

Asked on 08/26/2021 by contute

1 answer

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