Questions tagged [cpp-ethereum]

The Ethereum C++ client.

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8
votes
3answers
6k 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 ...
7
votes
1answer
7k 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 ...
4
votes
1answer
610 views

Can geth and eth share the same accounts and blockchain?

It appears when I have multiple ethereum clients installed, that they all have their own data, accounts and even their own copy of the blockchain. Is it possible to share accounts and the blockchain ...
4
votes
1answer
4k views

How can I import geth accounts into eth?

I had two accounts under ~/.ethereum/keystore when I used geth a while ago. I got a new PC, recompiled only the C++ version and I can't see my two accounts in eth. web3.admin.eth.allAccounts() ...
1
vote
1answer
6k views

I sent My ETC to my ETH address

I've sent a mistake ETC from ETH address from poloniex. How do i do now. This is my transaction (this is a fresh address) http://gastracker.io/tx/...
4
votes
1answer
3k 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 ...
6
votes
2answers
9k 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 ...
3
votes
1answer
298 views

cpp-ethereum build error

I have cloned the cpp-ethereum in Linux (centOS) from git as follows as suggested in cpp-ethereum-develop cmake error git clone https://github.com/ethereum/cpp-ethereum cd cpp-ethereum git ...
2
votes
2answers
398 views

Why immutable contracts [closed]

I'm a seasoned engineer, but quite new to blockchain technologies. I'm trying to grasp the "why" and the real "value" of immutable contracts. Never seen or heard of pieces of software being ...
1
vote
1answer
289 views

cpp-ethereum-develop cmake error [duplicate]

I have downloaded "cpp-ethereum-develop" zip file from github and unzipped it. While executing "cmake eth" It gives the following error. Unknown CMake command "eth_simple_add_executable". CMake ...
0
votes
2answers
347 views

How to make an action to send record to my database?

I want all transaction of the tokens send to my database through smart contract. For example, A send 10Token to B, it will show on blockchain, but I also want a function which smart contract will let ...
5
votes
1answer
387 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 ...
11
votes
4answers
17k 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 ...
4
votes
1answer
454 views

Is possible to transfer data between nodes using cpp-ethereum's whisper protocol?

Right now I am working on developing a standalone application in C++ using libraries of cpp-ethereum, I was looking at the source code for cpp-ethereum and an idea stuck into my mind that wouldn't it ...
3
votes
1answer
669 views

ethminer || Segmentation fault: 11 [duplicate]

I recently updated cpp-ethereum. I am now on ethminer version 1.2.3 when I start it to mine with ethminer --opencl-device 1 I get the folowing output. Getting work package... Segmentation fault: 11 ...
2
votes
2answers
657 views

Can't enter any commands after starting eth on Windows

I'm running the eth client (0.9.41) on Windows 10 using the following command: eth --frontier -b -i as stated here. The program hangs and I'm not able to enter any commands. The last produced ...
2
votes
2answers
2k views

Any quick, easy ways to convert ERC-20 tokens?

Are there any quick ways to convert my Airdrop ERC-20 tokens from various old ETH wallets to ETH/BTC...? Looks like I've got a few hundred $ kicking around in old Airdrop tokens. I've seen a few ...
1
vote
1answer
253 views

How to invoke multiple oracaliszed queries from a single contract

I want to invoke 2 different orcalized queries from the same contract. I saw a few posts but none of the answer works. Is there any way we can do that? Here is my contract. I was expecting this ...
1
vote
1answer
296 views

How to modify the gasLimit of the private block chain on the console

as the title,How to modify the "gasLimit" of the private block chain on the console?