34 votes

What is coinbase?

Crypto currencies and blockchains in general allow you to work with arbitrarily many accounts at the same time. However often people want to have a default/primary account (e.g. miners have a ...
Péter Szilágyi's user avatar
18 votes
Accepted

Error "no key for given address or file" when unlocking coinbase account

We were getting the same error and it turned out that there were two conflicting keyfiles. One in the default (~/.ethereum) and one in a custom location that we had specified using --datadir. In the ...
Peter Munnings's user avatar
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
8 votes
Accepted

How can I locally store my Ether from Coinbase?

For cryptocurrency wallets, you have four choices: Web-based wallet: Which is what you have with Coinbase; they have the keys for you and make things easier for you (as you don't have to install ...
MidnightLightning's user avatar
8 votes
Accepted

Difference between web3.eth.getCoinbase() and web3.eth.getAccounts()[0]

web3.eth.getCoinbase() returns the account that your mining rewards go to. web3.eth.getAccounts()[0] returns the first account you created (index 0) Web3.js doesnt expose this API (probably because ...
0xsegfault's user avatar
  • 1,260
7 votes
Accepted

Does a mining reward transaction have a hash?

There are no inputs and outputs in Ethereum, just state changes and balances. Therefore, mining rewards don't have a transaction hash since they are not a transaction. Each block contains the miner'...
Tjaden Hess's user avatar
  • 37.1k
7 votes
Accepted

Why do some blocks contain no transactions?

Some possible reasons: No one sent a transaction during that timeframe. Someone was mining and found a solution before it received any transactions to include in the block. And this solution was ...
eth's user avatar
  • 85.8k
6 votes
Accepted

Does Rinkeby Faucet Test Net send real ether?

The test-nets (such as Rinkeby) can be thought of as an alternate dimension for all intents and purposes. They are a place to run experiments without modifying the real Ethereum network. The ether ...
fspmarshall's user avatar
5 votes

Error "no key for given address or file" when unlocking coinbase account

Or you could just specify location of --keystore ( https://github.com/ethereum/go-ethereum/wiki/Command-Line-Options ).
polux's user avatar
  • 53
5 votes
Accepted

Is it possible to define a smart contract as the address when mining on a pool like ethermine?

If you are mining on a pool, unless the pool clearly states that you can because they make sure to send enough gas, you can't redirect reward to a contract without risking to loose it if the ...
tayvano's user avatar
  • 16k
5 votes
Accepted

Regular address turns into a contract after receiving a transfer?

Looks like the answer to your question is CREATE2. This is an EVM opcode that was created to allow contracts to be created deterministically, (other people use the term 'counterfactually') It's a ...
Zakalwe's user avatar
  • 397
4 votes

Why the amount of ethers in the block chain(Private) increasing?

In Ethereum you get 5 Ether as reward if you are the one who first solves the puzzle and, consequently, you are the one who adds the new block to the blockchain. This happens on any network, be it ...
dragosb's user avatar
  • 2,370
4 votes

Coinbase Account and Etherscan

I not a user of Coinbase, but from my common sense theory, they settle your balance only on at an outgoing transaction to reduce transactional expenses and to have an ability to exchange your ether ...
Igor Barinov's user avatar
  • 2,138
4 votes

Does Rinkeby Faucet Test Net send real ether?

You will not receive ether sent from a testnet to your Coinbase account, which is connected to the mainnet. They are separate Ethereum instances and have separate ledgers.
Miguel Mota's user avatar
  • 5,163
4 votes

Can I receive ERC20 tokens on my address hosted on Coinbase

Absolutely do not send any tokens to Coinbase accounts. Coinbase does not support tokens. Coinbase customer support does not offer help to recover accidentally send tokens. Consider your tokens lost.
Mikko Ohtamaa's user avatar
4 votes
Accepted

coinbase and accounts[0] - web3.js

web3.eth.accounts[0] refers to very first address created on an Ethereum node. web3.eth.coinbase returns you the coinbase. Coinbase or the Etherbase is the account in which your mining Ether i.e Block ...
Aniket's user avatar
  • 3,545
4 votes
Accepted

why is there no software downloadable wallet for ETH?

Most (if not all) of the wallets you mentioned are non-custodial, meaning that they do not control your funds. If a service were to go down, you can simply go to another and use your private key there....
Morten's user avatar
  • 6,017
3 votes

How to switch bitcoin to ether in coinbase

The simplest method would be to set up a local currency wallet on Coinbase, and sell your BTC to that wallet. Then, you can use the funds from that wallet to purchase ETH.
arseniy's user avatar
  • 376
3 votes
Accepted

How to switch bitcoin to ether in coinbase

Open a Jaxx Wallet and send your bitcoin there and you can switch to ethereum there
Diana's user avatar
  • 191
3 votes
Accepted

I have a DAO wallet with 1100 tokens - how can I get that into Coinbase as ETH?

The DAO on the hard-forked chain has been converted into a withdrawal contract. You can convert your DAO tokens into ETH using this withdrawal contract - see How do I convert my The DAO tokens into ...
BokkyPooBah's user avatar
  • 40.3k
3 votes
Accepted

Is it possible to change the coinbase dynamically?

With coinbase I guess you mean default address your web-application uses? Testrpc initialized by default 10 accounts. If you want to switch account in the javascript frontend, you can change the ...
Gerbrand's user avatar
  • 271
3 votes
Accepted

Why the amount of ethers in the block chain(Private) increasing?

Mining is rewarded, even in a private blockchain, 5 Eth for each block. In your case, you are the only miner, so you get 5 ETH almost continuously... For more information concerning the minig : ...
yoregis's user avatar
  • 1,242
3 votes
Accepted

Can I receive ERC20 tokens on my address hosted on Coinbase

There's nothing technically CoinBase could do to stop someone from sending tokens to one of their addresses--that transfer takes place in the token contract and can be initiated by the sending account,...
Thomas Jay Rush's user avatar
3 votes

How to create cryptocurrency coin for trading?

Coin is native currency of the blockchain, Token is a currency of a particular contract account, with some restrictions. No, you should copy ethereum binaries, modify chainID and create your own ...
Nulik's user avatar
  • 4,061
3 votes

Regular address turns into a contract after receiving a transfer?

CREATE2 is very cool, I was one of the engineers that worked on this project at Coinbase Commerce. You can read more about the implementation and our approach at the following blogpost https://blog....
Bojan's user avatar
  • 35
3 votes
Accepted

How do I import my coinbase wallet to metamask

You first need to log out. in order to do so, click on your account picture on the top right. then click on "lock". this will log you out of Metamask. after logging out, right before you ...
Masoud jt's user avatar
  • 751
2 votes

Why the amount of ethers in the block chain(Private) increasing?

The Ether is a reward for mining, on any chain, the system always works the same. It does not matter whether you mine a private, a testnet or the public network chain. However, the mined Ether on a ...
q9f's user avatar
  • 32.9k
2 votes

Error "no key for given address or file" when unlocking coinbase account

in geth console issue web3.personal.importRawKey("private key", "password") After that I was able to unlock
s k's user avatar
  • 886

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