Skip to main content
33 votes
Accepted

Solidity: private vs public variables

No. For public variables with a global scope within a contract, only getters for those variables are automatically created by the compiler, not setters. Because of the first answer, this does not ...
Giuseppe Bertone's user avatar
25 votes
Accepted

How can I get a private key from a mnemonic phrase?

Here are two options: Using ethers.js - the example below uses a mnemonic ethers wallet documentation const ethers = require('ethers'); let mnemonic = "YOUR MNEMONIC"; let mnemonicWallet = ...
Steven V's user avatar
  • 1,481
14 votes

What is the difference between an exchange like Coinbase and a wallet like Jaxx, MEW, MetaMask?

Your ETH & tokens are on the blockchain, regardless of what service you use to access them. When you move them, you are sending them from one address on the blockchain to another. These are simply ...
tayvano's user avatar
  • 16k
14 votes

Issue with "Generating Transaction" with MEW offline

All fine, the offline wallet addresse created on the pc but could not generate the transaction, so I generated it with an regular pc but offline (and i will low format the hardisk and reintall win), ...
Gaab's user avatar
  • 381
13 votes

How do I change the owner of an ENS domain using MyEtherWallet?

Instructions for MyCrypto & MyEtherWallet Transferring a Domain (Best Practice) Search for your ENS name on MyCrypto's ENS Page Copy the text to the right of Labelhash __name:. Go to the ...
tayvano's user avatar
  • 16k
13 votes
Accepted

Why does my smart contract tokens not show up in MyEtherWallet or MetaMask?

You need to give Metamask the address of the token itself, not the address of the contract that created the token, like you did. I made the same mistake myself.
memius's user avatar
  • 246
11 votes
Accepted

How to view custom token balance in ether wallet using web3

Here is my suggestions: ERC20 token balance Just to clarify, all ERC20 tokens have the same set of methods (ERC20 protocol). Now, there are two ways to accomplish your task: use ERC20 balanceOf(...
Vanja Dev's user avatar
  • 871
10 votes

Lost Ethers in Google ad phishing scam

This was a phishing attack. The true URL for MyEtherWallet is https://www.myetherwallet.com You went to ether-wall dot com. Always check that your connection is over HTTPS. There's not much we can ...
Tjaden Hess's user avatar
  • 37.2k
10 votes

Does metamask store private key on server or anywhere else?

Metamask stores your encrypted private keys using your browser's data store. At no point does Metamask store your actual private keys. The source code of Metamask is auditable, like Parity and ...
lungj's user avatar
  • 6,680
9 votes
Accepted

Is it possible to tell whether an address is mist, mew or parity?

TL;DR: Sort of. As Ismael notes above, keys are random and all clients are following the same basic standards, meaning that being able to tell which client an address was generated by is not an ...
Jeff Coleman's user avatar
  • 22.1k
8 votes

Are there Ethereum Wallets (other that Mist) that provide support for test-network

The word light-wallet or light-client can mean a number of things. There is the fast-sync'd versions of geth and parity which reduce the amount of data necessary on your hard drive. There are also ...
tayvano's user avatar
  • 16k
8 votes
Accepted

How to connect etherwallet to my private blockchain?

I think your main issue is, you are binding only to the localhost address, are you running geth on a remote server? or are you running it on your local machine and also running the mew_relay on the ...
kvhnuke's user avatar
  • 106
8 votes
Accepted

How does the ethereum network validate addresses that were created offline?

The network doesn't validate addresses. You can create an address with a arbitrary bunch of hex characters and send ETH to it. Since neither you nor anyone else has a private key unlocking that ...
Edmund Edgar's user avatar
  • 16.9k
7 votes

How to find the contract wallet JSON and ABI

Just got in touch with avsa who was kind enough to point me in the correct direction: [{"constant":false,"inputs":[{"name":"_owner","type":"address"}],"name":"removeOwner","outputs":[],"type":"...
tayvano's user avatar
  • 16k
7 votes
Accepted

Is it common practice to have multiple wallets?

Wallets are just a way to store your private keys. Ether is stored (besides smart contract code and data) in addresses on the blockchain, or rather, records like "address X has amount Y of Ether". ...
comodoro's user avatar
  • 1,212
7 votes

Is there a simple Ethereum address generator that consists only of private key and public key?

This one will provide a simple Ethereum address and private key as you asked for. https://vanity-eth.tk/ Output: Address: 0x1Ff482D42D8727258A1686102Fa4ba925C46Bc42 Private key: ...
nick carraway's user avatar
7 votes

Fast syncing showing endless importing new state entries Geth 1.7.3

If you see that, you aren't yet synchronized, not even close. You are just done with the block download phase and still running the state downloads. You can see this yourself via the seemingly endless ...
MateMstar's user avatar
6 votes

Passing constructor arguments while deploying contract from byte code

If you look at Web3's documentation, you can get the full deployment bytecode with: var bytecodeWithParam = MyContract.new.getData( param1, param2, { data: compiledByteCode }); It is ...
Xavier Leprêtre B9lab's user avatar
6 votes

Are there Ethereum Wallets (other that Mist) that provide support for test-network

MyEtherWallet has testnets: Ropsten
MirceaMoca's user avatar
6 votes

Saving ether from a corrupt ether wallet

Yes, wallet files can be corrupted however, if the wallet was corrupt, you would not be able to decrypt / access it, so that is not the issue. I'm waiting on kvhnuke to get off work to see if he can ...
tayvano's user avatar
  • 16k
6 votes
Accepted

What is chainID? Raw transaction from myEther wallet

The chainid was added about 1 year ago in order to prevent replay attacks across channels. This was due to the ETH / ETC fork, but also applies to testnet and alternate chains (like Expanse). Here you ...
tayvano's user avatar
  • 16k
6 votes
Accepted

How to prefill fields on myetherwallet with given receiver address, amount, and gas limit?

MyEtherWallet supports URI Strings on the Send Transaction Page. to=[address] value=[number] sendMode=[ether | token] tokenSymbol=[ARC | ICN | MKR | ....] gasLimit=[number] OR gas=[number] data=[hex ...
Wietze's user avatar
  • 126
6 votes

Migrating from paper wallet to Ledger Nano S with private key ONLY

Our full guide can be seen and read here: https://myetherwallet.github.io/knowledge-base/migration/moving-from-private-key-to-ledger-hardware-wallet.html Basically, use your private key to unlock ...
tayvano's user avatar
  • 16k
6 votes

Login system for DAPP without metamask

I've recently came across this project claiming to be alternative to MetaMask: https://fortmatic.com/ I just got into the alpha and started playing around with it, and so far looks promising, pretty ...
Evan H.'s user avatar
  • 171
5 votes

How to move DAO tokens in myetherwallet.com to Ethereum Wallet?

@tayvano's answer will help you move your Ethereum accounts into Ethereum Wallet (Mist). You will have two more steps to do if you want to view your TheDAO tokens in the Ethereum Wallet and vote on ...
BokkyPooBah's user avatar
  • 40.3k
5 votes

How to generate paper wallet on myetherwallet.com?

you are on the right way just continue, after downloading the json file press the button 'i understand, continue' then choose print.
Badr Bellaj's user avatar
  • 18.8k
5 votes
Accepted

Can I reuse a signed transaction generated offline by MyEtherWallet?

Each transaction requires a nonce (or sequence counter) value from your account. For each transaction you submit, the nonce is incremented. This is intentional to prevent replaying transactions. ...
dbryson's user avatar
  • 6,393
5 votes

Send Entire Balance

The error is quite clear, so I assume your question is about why the gas cost is 21004 instead of what you expected (21000). The extra 4 gas is because you're sending a data field with one byte in it,...
user19510's user avatar
  • 28.1k
5 votes

What is the best OPEN-Source ETH explorer? (alternative to etherscan)

If you want to run it locally Otterscan is really nice. If you are thinking about running a block explorer for your own network the ones you listed might be a better choice (especially BlockScout, as ...
Richard's user avatar
  • 5,079
4 votes
Accepted

How to transfer DAO from MyEtherWallet to Kraken? (DAOs transfer method)

Go to https://www.myetherwallet.com/#send-tokens. Enter your private key and unlock your wallet. Enter your Kraken address and the number of The DAO tokens you want to transfer. Ensure the "DAO" ...
BokkyPooBah's user avatar
  • 40.3k

Only top scored, non community-wiki answers of a minimum length are eligible