Questions tagged [accounts]

Ethereum has two types of accounts: externally owned user accounts, controlled by private keys, and contract accounts, controlled by their contract code.

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web3.eth.accounts[0] undefined

I am new and I am trying to make my first transaction using geth and truffle. to specify a sender address I type in the truffle console: src = web3.eth.accounts[0] but I get "undefined" if I ...
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trying to send some tokens from unlocked account

So I'm trying to send some tokens from an, with ganache-cli unlocked, address to mine to try something out, however for my code to work I need some starting amount of the initial token. Is there some ...
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How can I create an ethereum wallet which can show many addresses balance?

I'm looking for a wallet which can scan many ethereum addresses balance,(like electrum for bitcoin). I need to import 200 (or more) eth addresses and scan their balances include their tokens(if funded)...
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Truffle Console: How to print Ether values for the accounts?

I am trying to follow a tutorial available at: medium Just Dev > getBalance = web3.eth.getBalance > balanceInEth = address => web3.fromWei(getBalance(address).toString()) I got errors so I ...
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How to synchronise accounts between different geth installations

I have a problem. If I build two geth nodes A and B, these two nodes are already in communication and synchronization. I created accountA on node A, and I can unlock accountA on node A with the ...
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What happens in the account state when we pre-send ethers to a smart contract?

I'm asking this question in relation to this one : pre_sending Ether where the OP asked in a comment of the answer about what happens at the low-level when pre-sending ethers to a smart contract. As ...
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1answer
51 views

Deploy from Remix to Quorum using password? “authentication needed: password or unlock”

I can SSH into the box that is running Quorum: run geth with the flag --allow-insecure-unlock geth attach new-node-1/geth.ipc personal.unlockAccount(eth.accounts[0]) I'm interested in knowing if I ...
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How do i change Truffle default account after contract deployment to interact with it?

I work with Truffle and Ganache along side Windows Powershell. Here, Truffle's default account is account[0]. I deploy my contract with that. After a while, i need to interact with the contract with ...
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ReferenceError: accounts is not defined

I was using "truffle test" for testing with JS. gives this error. here is the code of that part. it('transfer success', function(){ return Eve.deployed().then(function(instance){ ...
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1answer
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Can queue of pending transactions will be confirmed if send last transaction with high gas price?

I have several pending transactions from the same account with a low gas price. What if I send one more transaction with next nonce but high gas price? Can it help to mine all pending transactions ...
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Import accounts on Ethereum Wallet is disabled

The Import accounts option in File is disabled. I am using the Ethereum-Wallet-linux64-0-11-1, latest version (now). After I reinstalled the OS, I tried to import some accounts. I copied the accounts ...
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Served eth_sendTransaction err=“unknown account”

I'm facing issue with private chain, when I run the node, it shows the logs as below, and transaction went in pending status. Folder structure All the wallet file reside into keystore folder. Node....
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Solidity-how to transfer ether from an account to a smart contract as deposit

I just started to learn Solidity. In the SimpleAution contract, there are two functions, bid() and withdraw(), the former iniating a bid, transfering some ethers to the contract as deposit, the later ...
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Is there a way to retrieve private key of ganache account with web3?

web3.eth.getAccounts() returns list of accounts. Is there a way around to get the private key of one of the account from the list returned from the above code?
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Reproducing a Ganache Server across multiple computers

There are multiple developers on the team and it seems as though we all want to be working on a specific test network with specific public and private keys with a specific number of users who all have ...
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problem with sending ethers on ropsten network

I am trying to send ethers from one address to another address on the ropsten network but I get the message "undefined". Here is my code: web3.eth.getTransactionCount(account1, (error, ...
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Is it required to use multiple Etherem accounts to send transactions on behalf of customers to avoid pending transactions?

We are developing an Ethereum based exchange. In our project, customers put their orders to send ETH or ERC20 tokens to others, and we currently do these transactions via our Ethereum account on their ...
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The send transactions “from” field must be defined using Infura web3

when I try to send my transaction using infura I get this error "The send transactions "from" field must be defined" My problem is my web3 object. When I used Metamask and ...
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It is secure do accounts just with web3.eth.accounts.create() ? (entropy)

const Web3 = require('web3'); let url = 'infuralink'; let web3 = new Web3(url); console.log(web3.eth.accounts.create()); This is the code of many tutorials for do a key pair. it is completely secure ...
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Truffle Console: “undefined” message varaiable declaration

I am giving following commands at Truffle console but I am getting "undefined" message: > $ truffle console > > You can improve web3's peformance when running Node.js versions older > ...
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1answer
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Was the function called before from a specific address?

Consider a function definition as below - function checkForUpvote() external returns(bool){ Here I would first like to check, if the external account invoking this function : has invoked this ...
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Ethereum transaction with multi input and multi output like bitcoin

What happens to my wallet when I only 1000 accounts with 0.0001 ether and the tx-fee is about the same, I can't spend anything anymore?
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Unknown Accounts suddenly appearing in MetaMask wallet…?

My MetaMask wallet has multiple accounts which I did not create. I have no idea how they there. Is my MetaMask wallet compromised? Or is this normal that MetaMask creates new wallet addresses when ...
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web3 does not find metamask accounts

I have a very strange bug in the code. When loading a page with a code, the current account in metamask should be determined. but this only happens on one local domain. in other domaines accounts are ...
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Can an Ethereum account be used by several users at the same time?

I am developing a DApp for donations (the donations are not in cryptocurrencies). I want the donor to make donations without registering on the platform. In fact, I don't need to know who he is. So it ...
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How to interact with Remix contract through web3py

I have an assignment for which I must write a client that can interact with a deployed contract by transacting and filtering event logs, but I cannot figure out how to successfully get either to work ...
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1answer
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How to sign transactions while Geth does not provide private key?

I've lunched Geth for the first time and created some accounts on it. While creating accounts, I entered a password for each, and a key file is generated which contains encrypted private key belonging ...
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1answer
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My cutom RPC meta mask created account is not showing in terminal

I have installed geth and created genesis.json and run my own private eth network. I started my rpc using geth --rpc --rpcport 5200 --rpcaddr 192.168.1.99 --datadir ./private Then I connected to ...
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How is the storage trie of a user account which does not belong to any contract?

We know that storage trie (stored in the leaf node of state trie) is storing the contract's data related to an account. Then, what will be stored in the storage trie of a user account which does not ...
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keystore path in geth command does not work

I've lunched Geth server and want to store data and keystores in a non-default directory. I've used this command to run Geth: geth --datadir /etc/dir/ --keystore /etc/dir/keystore/ But when I run ...
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2answers
342 views

How Ethereum supports in dealing with double spending problems

Let's us consider a scenario where I am using my ethereum wallet for creating a transaction request (where my account balance is 100 eth and I am doing a transaction of 50 eth to someone from one ...
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1answer
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Difference between web3.eth.personal.getAccounts() with web3.eth.getAccounts()

What are the differences between web3.eth.personal.getAccounts() and web3.eth.getAccounts()? environment truffle: v5.1.7 using truffle console.
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1answer
272 views

Generating multiple deposite address for one account

I want to create something like a Crypto exchange, in which I need to generate different unique deposit addresses for each user, so they can send funds to their accounts while I can keep track of how ...
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Golang list unlocked accounts from node

Wondering how would I access an unlocked account on the node (private geth) in golang. The flow I'm looking for is: 1. user unlocks their account (using personal.unlockAccount for example) 2. my app ...
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1answer
417 views

Execute transaction Approve directly against contract address (without ABI)

Solved For now, you will always need the ABI to execute a call against the ethereum network with web3. A simple way is to reconstruct the function you wish to execute is to, either create a separate ...
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3answers
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Can an NFT (e.g. ERC721) simultaneously belong to two different entities, say an user Owner, as well as a user Custodian?

For example, on the blockchain say you own a ERC721 Car token at your wallet address, but you want to park it in the ERC998ERC721 top down composable Garage owned by your friend, while still retaining ...
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2answers
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Reinstalled MetaMask, account lost?

I had 3 accounts under my MetaMask Chrome extension. One of them had some small deposit. I have reinstalled the extension and used seed phrase to get access again. However, I can see only one account (...
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1answer
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private key vs seed

I made an extra account in Metamask for my GF, I kept Account 1 for myself and I gave only the private key of Account 2 to my GF. I kept the seed words only to myself. Since then, she has dumped me ...
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Unable to Unlock Account Even After specifying allow-insecure-unlock

Software: Ubuntu on VirtualBox Update, tried putting two dashes, on allow-insecure-unlock, doesn't work solidity@solidity:~$ geth attach http://127.0.0.1:8545 --allow-insecure-unlock Incorrect Usage:...
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1answer
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Unlock Ethereum account via infura

I am trying to connect my wallet (Metamask) via Infura, but I receiving an error. My code: [HttpPost] public async Task<IActionResult> LoginAsync([ModelBinder(typeof(AccountBinder))] ...
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getAccounts undefined recently

I've been using web3 v 0.20 and I recently noticed that getting accounts from web3.eth.getAccounts(function(error, accounts) { returns undefined. Is Metamask 7.2.1 forcing it to be undefined for ...
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2answers
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How to check Ethereum smart contract info?

I want to know 3 things: Is an address a smart contract? Is this smart contract an ERC20 or ERC721 token? Is the Solidity code public?
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Which one is more secure and easier to mange among eth.accounts.create, personal.newAccount & eth.accounts.wallet.add

Here are what I knew about them: eth.accounts.create: Generate an address and private key for transaction but did not stored in anywhere. personal.newAccount: Create an account under node, so that ...
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1answer
106 views

Geth + Web3 | web3.eth.getAccounts() returns undefined

I have follow this SO answer for sending ERC20 tokens from 1 address to another. I am running into an issue where I am receiving an error that my from address is invalid Error: Error: ...
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1answer
33 views

How to call a function with params and check them

I want to create a smart contract that users can send a number to and receive an amount of ether. function airdrop(uint val) public payable { require(airdrop == true); if (val == 0x31){ ...
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3answers
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How smart contract transactions work?

I read that smart contracts don’t have a private key, so they can’t sign a transaction. My question is: when a smart contract starts a transaction to an EOA, how are we sure that the smart contract ...
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Alternatives to Metamask

What are existing alternatives to metamask with that works online inside existing browsers, that don't require installing a browser extension? What are some of the tradeoffs between them?
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Both web3.eth.accounts.create() and web3.eth.personal.newAccount() not working

I'm making a dApp on reactjs. I wanted to create a new account and have done it trying 2 methods this.web3.eth.personal.newAccount() this.web3.eth.accounts.create() I have attached the code below(...
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Multiple Accounts on a single node?

I am a beginner and learning Ethereum. Can somebody please tell me if my understanding is correct? Q) There could be just 1 node running, but multiple accounts?
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Where is storaged the publickey for any account?

I have been reading the Ethereum Yellow paperthat for any account there are four parameters: nonce balance storageRoot codeHash A transaction is signed using three parameters: r,s,v According to ...

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