All Questions
503 questions
38
votes
5
answers
35k
views
How to explore all transactions for a given account?
After beeing able to check account balances, I am looking for a method to list all transactions for a given Ethereum account through json-rpc protocol. I haven't found any method suitable for that on ...
22
votes
4
answers
16k
views
Error "no key for given address or file" when unlocking coinbase account
Using json-rpc eth_unlockAccount() method I can unlock everyone of my node accounts except coinbase. When trying to unlock coinbase account, geth responds with the message:
no key for given address ...
21
votes
2
answers
14k
views
How do I remove accounts using the Geth console?
I have several accounts I've created in the Geth console using:
personal.newAccount()
I no longer use (nor have any intention of using) the first couple of accounts I created, meaning whenever I ...
- 38k
21
votes
1
answer
20k
views
Getting private keys of geth accounts
Just the opposite of this question How to import a plain private key into geth or Mist? I would like to know how can I obtain the private keys of the accounts created with geth in this way:
$ geth --...
18
votes
3
answers
20k
views
How can I get my accounts into metamask or vice versa?
I need my accounts in Metamask to match my local machine so I can deploy from the machine (using truffle), and test in a browser. How can I either:
Upload my local geth accounts to Metamask
Bring ...
- 2,790
13
votes
2
answers
1k
views
If someone gets my geth keystore files, can they spend my ETH without knowing my password(s)?
I always assumed so, since geth requires a new password for every account, but just want to be sure.
- 724
11
votes
4
answers
18k
views
ethminer Failed to submit hashrate
I keep getting an error: ethminer Failed to submit hashrate :(
I am very new to this whole mining thing, and just want to learn more.
I am using:
Geth
Version: 1.5.0-unstable
ethminer version 1.2.7
...
- 133
11
votes
1
answer
4k
views
Sign raw transaction offline with C++ on arduino
I'm exploring the IoT side of the EVM. I've programmed Arduinos and ESP8266s to interact with a Geth JSON RPC. I'm trying to be minimalistic and avoid NodeJS on the Geth JSON server side. Currently ...
- 441
9
votes
1
answer
6k
views
How to unlock accounts programmatically after the node has started?
Is there any way of just unlocking accounts without opening the console with geth?
I'm writing some scripts to automate cluster generation and I wish I could just call geth to unlocking some accounts ...
- 2,491
9
votes
3
answers
7k
views
Convert an eth key to a geth key
I need to convert my eth key to a geth key.
eth put the key in %appdata%\roaming\Web3\keys, and I see it as a .json file. If I move that to the %appdata%\roaming\Ethereum\keystore directory, geth ...
- 93
9
votes
1
answer
2k
views
How can I generate a V3 of the Ethereum wallet file format in js, from strings: 'Passphrase' and 'Email or username' required by Quorumwallet?
Quorum Wallet prompts for a Passphrase and a Email or username to generate the account.
On the FAQs there is a description of the algorithm to generate the account:
What is the algorithm used to ...
- 161
9
votes
2
answers
3k
views
How to preallocate multiple accounts with ether for geth --dev chain?
I'm trying to set up a private chain with geth using --dev that has several accounts with lots of ether. It seems unclear if this is possible anymore according to this.
Here's what I tried on geth 1....
- 261
8
votes
3
answers
6k
views
CPU mining JSON_PARSE_ERROR
I just wanted to mine ETH with my CPU. I use Windows 7 64 Bit with ethminer.
I started the cpu miner with a batch
ethminer -t 6 -C -F http://ethereumpool.co/?miner=5@0x17C0Bea7c44*******...
- 161
8
votes
3
answers
5k
views
Mining ETH on HD 6950 DAG allocation problem
I have 2 HD6950's which I wanted to use for ETH mining - but I have the well known DAG allocation problem.
I can't find a solution for this problem - that's why I'm asking here. And please don't tell ...
- 161
8
votes
1
answer
2k
views
**Updated** Ethminer - no such file or Directory error after building cpp-ethereum on Ubuntu 14.04
I am new to all of this, although I do some programming on Windows and the web.
I have a small rig I want to use for mining ethereum. It is a dell inspiron 560.
It has a new Nvidia GE-Force 610 ...
- 81
7
votes
1
answer
10k
views
ETH sent to ETC address
I accidentally sent ALL my ETH on ETC address :(
6 months of mining gone :(
I sent from one exchange to fresh address on another exchange, but on ETC ...
Is there ANY way to track those coins?
I'm ...
7
votes
1
answer
19k
views
Different way of creating account
I have created one account using the command geth account new , name acc1 and another under the geth console using the command personal.newAccount() name it acc2. Now i am not able to see the acc1 ...
- 3,545
7
votes
3
answers
1k
views
What is the difference between "eth.accounts" and "web3.eth.accounts"?
The instructions for creating a new account on the Geth console state:
Tip: If you are using Geth then you can just use eth instead of
web3.eth command.
Meaning accounts can be referenced by ...
- 38k
7
votes
1
answer
631
views
Is it possible to tell whether an address is mist, mew or parity?
How can I tell if an address is from Mist, MyEthereumWallet or Parity? Is there anyway to know? Are they encoded differently?
- 297
7
votes
3
answers
3k
views
Is there any c++ library for signing transactions?
I am working on light wallet in c++, and I am looking for a c++ library for signing transactions. I mean something where i will pass transaction and private key and it will return signed transaction ...
- 101
7
votes
1
answer
3k
views
Is there a downloadable Ethereum bootstrap?
I am trying to synchronize a full node, and this is going very slowly, the progress alternates between bursts of high CPU usage (which is fine, it is heavy but importing), and long times with nothing ...
- 171
6
votes
2
answers
10k
views
How to install eth on debian? (symbol lookup error)
I installed from the ubuntu ppa and got this error.
➜ ~ eth
eth: symbol lookup error: eth: undefined symbol: _ZN3dev3eth14EthashGPUMiner14s_numInstancesE
What can I do / check?
I'm on debian ...
- 4,640
6
votes
2
answers
3k
views
Ethereum Merkle Patricia Trie (Extension node)
I do not have time to look through the source code right now. My questions is:
In Ethereum, when is the decision to replace part of a given path with an Extension-node made?
I suppose the sole idea ...
- 323
6
votes
2
answers
5k
views
geth account list returns accounts but eth.accounts does not
I had my ethereum node on one server. I needed to migrate the accounts and all to another server (due to the huge size of blockchain). I started new ethereum node on another server. To copy my ...
- 8,076
6
votes
1
answer
934
views
Ethereum Merkle Patricia Trie and Hashes
In Ethereum, there's a hash of all of the 3 tries in each block.
Out of curiosity.
The docs state that the functionality is supposed to just provide a mapping between 160bit keys and values. I find ...
- 323
6
votes
1
answer
1k
views
Unable to send raw transaction
i'm working on to the morden testnet and using a nodejs application i wrote (using ethereumjs-util, ethereumjs-tx) i'm trying to push a raw tx on to the testnet.
I've tested GETH "eth....
- 219
6
votes
2
answers
2k
views
Why did the DAG file change in block 1080000?
I'm mining to dwarfpool, and all of sudden am getting this message on the account: "DAG file changed in block 1080000"
Does this mean that my DAG is out of sync and if yes, how do I resync it, tried ...
- 475
6
votes
1
answer
4k
views
Is it faster to use "geth --unlock" than "personal.unlockAccount"?
I have a script that I run with geth attach, and then I use:
primary = eth.accounts[0];
personal.unlockAccount(primary, "password");
like I saw in the example script.
Doing this in geth usually ...
- 1,536
6
votes
1
answer
330
views
How to implement Ethereum protocol to some tinyOS, e.g, contiki?
I find out Ethereum has many implements to many OS with many different languages.
But i don't know if I want to use ethereum as protocol on contiki OS or cooja simulation, so what is the best choice ...
- 455
6
votes
3
answers
2k
views
How to exchange ETH to DAI with web3 and node.js
I looking for solution how to convert eth to dai with web3 api. something like
https://kyber.network/swap/eth_knc
(I can send eth to specyfic contract adress and I receive back DAI to the same ...
- 61
6
votes
3
answers
2k
views
Asset creation in ethereum
Is it possible to create assets in ethereum which will automatically get linked with a particular address and will be able to send from one account to another without using a contract? I have seen ...
- 455
6
votes
1
answer
4k
views
List all ethereum accounts using geth [duplicate]
Etherscan displays all accounts in ethereum being used in the following section https://etherscan.io/accounts
Question: How can I get a list of all active ethereum accounts using geth?
Possible ...
- 1,688
5
votes
2
answers
8k
views
How do you create a new contract instance with an address *and* arguments?
There is the standard way of creating contract instances with the new keyword where you pass arguments like:
MyContract mine = new MyContract(arg1, arg2);
Then there is another way, like in this ...
- 153
5
votes
3
answers
6k
views
How store ETH in a smart contract
The question it's How store Ether in a smart contract.
In first step, I try transfer the transaction value to the smartcontract address doing something y something like that:
function storeETH() ...
5
votes
2
answers
7k
views
How to implement role-based access control to user's private data?
We have this application scenario and try to see if Ethereum, or blockchain in general, is a good solution for this.
The basic idea is the user controls a small amount of private sensitive data (e.g....
- 177
5
votes
2
answers
1k
views
What actually happen when we unlock an account?
I know the purpose of personal.unlockAccount() function is to unlock account i.e. when I want to send ETH or tokens.
After reading the documentation, I'm still not sure what is actually happening ...
5
votes
4
answers
807
views
Why do you want to use different implementations of EVM?
Currently there are many implementations of EVM (Java, C++, Python, Go, etc).
For example: I will be using Solidity to write DApp on the top of EVM-Java and EVM-Python, why would I want to use EVM-...
- 461
5
votes
2
answers
1k
views
Nested Contracts in Solidity?
As per the Solidity 0.4.16 documentation, contracts are similar to the concept of a Class of an object oriented language. That being said, can we create a Contract within a contract.
IF yes, then ...
5
votes
1
answer
2k
views
Create a new contract by JSON-RPC of cpp-ethereum
I want to create a new contract by JSON-RPC and cpp-ethereum.
I find out eth_sendTransaction can help me to do this.
And let do it, I need to set "to" parameter like that:
to: DATA, 20 Bytes - (...
- 173
5
votes
1
answer
13k
views
The ERC-20 Token Transfer might have Failed (ErrCode: unable to locate corresponding Transfer event log), check with sender
EtherScan.io is showing error: The ERC-20 Token Transfer might have Failed (ErrCode: unable to locate corresponding Transfer event log), check with sender.
Transactions are successful but users are ...
- 51
5
votes
1
answer
1k
views
Geth not synchronizing to MetaMask
I want to import my account of MetaMask(testnet) to the geth accounts list.
First I copied the private key from MetaMask and saved to a txt file.
After that I run this command :
geth account ...
- 144
5
votes
2
answers
555
views
Eth Console Won't Start: Invalid Argument Console
Can't Use "Eth Console" Command upon Installing Eth with Spacebrew
Hi everyone, I'm learning how to create my own d'apps on the Ethereum blockchain as part of a Master's thesis research process. So ...
- 51
5
votes
0
answers
377
views
Trying to send ETH from Mist Wallet to Poloniex, received ETC instead [closed]
I want to send both my ETC and ETH to Poloniex.
I have a basic understanding of the DAO fork and know nothing about programming. I googled something about a replay attack and using a split contract. ...
4
votes
3
answers
16k
views
Add existing wallet to geth with address and password
A few months ago I mined some Ethereum. I do not have the .json file anymore. But I do have the address and the password. Currently I'm running Geth (for the past 12 hours) but I'm not able to put in ...
- 143
4
votes
1
answer
521
views
How to get UTXO set using JSON API?
My blockchain development background is in Bitcoin, but it now seems to me that the most dynamic and interesting blockchain platform is Ethereum.
In my quest to grok the Ethereum protocol I'm ...
- 921
4
votes
2
answers
986
views
How do I transfer funds to another account from a lightwallet.dat file
I have a lightwallet.dat file which I exported from ujomusic.com. It's in a different format to that used by geth. I don't expect geth will import it so can I create an account with the same number as ...
- 2,559
4
votes
1
answer
1k
views
creating wallets for my websites users
I am developing an app that uses Ethereum as its payment method, and in the app, users will have their own balances. But there is a slight problem and it has to do with fees.
If a user deposits ...
- 915
4
votes
1
answer
12k
views
Account is locked. How to unlock it using json-rpc? [duplicate]
When trying to send a transaction through json-rpc interface on a geth node (version 1.4.10-stable-5f55d95a, running on testnet) using eth_sendTransaction I got this error message:
-32000 [message] ...
4
votes
3
answers
2k
views
Is there a way to transfer my ETH from a cold storage to a hot storage without compromising it?
At first I wanted to use myetherwallet.com but now I am afraid the code may be hacked / corrupted some day.
The cold storage solution seems safer to store ETH in the long run.
While I understand how ...
- 183
4
votes
1
answer
304
views
How to bootstrap AlethZero on Morden testnet?
I am trying to use the testnet using AlethZero. I use this command alethzero --morden as suggested in the wiki. It does not seem to connect to any peer and hence does not sync the blocks. I also tried ...
- 33k