All Questions
Tagged with eth or cpp-ethereum
383 questions
1
vote
1
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702
views
I sent ETH to my receiving contract address [closed]
I sent ETH to one of my receiving address which is contract address. But this receiving contract address was my personal trading wallet address. But, no transaction I'd has been received. When will I ...
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
0
votes
1
answer
99
views
Smart contract development
I have read at many places
peoples require someone with an excellent experience to develop and
deploy a smart contract for ICO
Here my question is, what exactly smart contract is here?
Does ...
- 409
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
1
vote
0
answers
34
views
Calculating data amount being mined. Server
Does anyone know how to calculate hardware being used by mining activity on a blockchain? I'm curious what the equivalent hardware usage is in a blockchain. I'm looking for a formula of blockchain ...
- 11
0
votes
2
answers
212
views
ETC transaction doesn't reflect in myetherwallet -help
I just transfer ETC from my POLO account to the ledger nano s using
myetherwallet,
Ans something wired happend :
Here i dont see that i got anything
https://etherscan.io/address/...
- 3
1
vote
1
answer
73
views
I transferred coins to an address that belongs to ETH wallet instead of ETC [duplicate]
I have a problem. so, Ask for help.
by mistake, I transferred coins to an address that belongs to ETH wallet instead of ETC.
Is ther a solution for this?
Pleas, see below.
- 11
1
vote
1
answer
168
views
keep records of who did send tokens , smart contract
I am trying to create a contract that only allow people who did send amount of wei to the token , to access a get function by keeping a record of all address & amount .
is it possible to do that ? ...
0
votes
1
answer
33
views
Spool out result using solidity
Does Solidity have any keyword to spool out results into an external file like .txt or .csv or .dat?
1
vote
1
answer
61
views
how to prevent spam block attacks in cpp ethereum?
it is really annoying. I'm running a sync with eth and every 1 or 3 hours there come giant spam block attacks, which slow down syncing dramatically. I delete network.rlp, restart eth and everything is ...
- 115
0
votes
1
answer
48
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strange log message in cpp-ethereum eth-log
I see a strange message in my eth-log:
[35m⚙^[[97m ◌ ^[[35m07:26:46 AM.561^[[0m^[[30m|^[[34meth^[
[0m Paying 63 szabo^[[0m from sender for gas
( ^[[34m21000^[
[0m gas at 3 Gwei^[[0m )
(sorry for ...
- 115
2
votes
2
answers
4k
views
Error: listen EADDRINUSE :::8545
C:\Users\Kane>testrpc
EthereumJS TestRPC v6.0.3 (ganache-core: 2.0.2)
C:\Users\Kane\AppData\Roaming\npm\node_modules\ethereumjs-testrpc\build\cli.node.js:74143
...
...
******Error: listen ...
- 93
0
votes
2
answers
945
views
geth attach issue between mac and windows
I am running geth on windows machine and try for geth attach in mac. I give
below error:
Fatal: Failed to start the JavaScript console: api modules: Post http://192.168.0.107:8545: context deadline ...
1
vote
2
answers
2k
views
ETH Block Rewards?
So, I'm still fairly new to ETH mining and I have recently heard about something called Block Rewards. I have read a bit on them via Googling, basically sounds like at some point, a miner can ...
- 21
1
vote
3
answers
660
views
Unable to transfer entire balance? what is the minimun amount needed for transfer?
Trying to transfer from myEtherwallet and it says "insufficient funds" - I lowered the amount and it worked, but I can't get the rest out. I've been searching for several hours (I told you I'm a ...
- 11
1
vote
0
answers
565
views
Can I use ethminer with just OpenGL
I have created a windows server EC2/GPU instance, downloaded the proper version of ethermine and tried to start mining. It says that it won't work thanks to no OpenCL or CUDa. This is confirmed by ...
- 121
2
votes
1
answer
782
views
web3 contract TypeError: 'apply' is not a function
I'm Trying to call the apply function on the contract ABI but I'm getting:
TypeError: 'apply' is not a function
at :1:1
> myContract
{
abi: [{
constant: false,
inputs: [{...}],
...
0
votes
0
answers
163
views
ETH stuck after cancelled due to "out of gas
I have seen another questions with the same problem but the answers given there do not work for me and therefor put my question here again.
I sent 0.5 ETH and 0.1 ETH from my Jaxx Wallet to Poloniex. ...
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
0
votes
2
answers
217
views
Is there a way to use A Smart Contract to Read Memory and Write to the blockchain?
Could someone create a smart contract where the target would be to read kernel memory (using some exploit) and then at the end of the smart contact it would write the kernel memory to the blockchain?
- 103
0
votes
1
answer
2k
views
I sent ETH to ETC from coinbase to Bitsane how do I get my coins back? [closed]
I sent ETH from coinbase and received confirmation that they were sent, but It looks like I sent it to ETC from on Bitsane how do I get my coins back?
I am very new to this process and very ...
0
votes
1
answer
10k
views
Is this laptop suitable for Ethereum mining?
I have a laptop with 4 GB of RAM, 1 TB HDD and an i3 processor running Windows 10 and Intel HD Graphics 520. Is there any chance I can mine Ethereum or Litecoin using this setup? If yes please someone ...
- 1
2
votes
1
answer
579
views
How do I know which transaction generated a contract in Factory pattern?
By factory pattern I mean a contract able to deploy other contracts like in this question: simple bakery factory pattern Each time I trigger
factoryInstance.newContract(args).then(promise);
I get ...
- 161
1
vote
1
answer
520
views
Profiling OpenCL Kernels on Linuix
I'm trying to carry out some reasarch on the performance of Ethminer, specifcally I'm looking to get data for any OpenCL kernels that are created during the mining process.
I'm trying to assess the ...
- 70
0
votes
1
answer
48
views
eth sent to non address due to 2 missing digits off the end of address, can it be retrieved? [duplicate]
Etherereum sent to non address due to 2 missing digits off the end of address, can it be retrieved?
0
votes
1
answer
127
views
Will I receive my Ether? Transferred to my wallet while the Ethereum wallet was downloading
So I was super excited to get the ethereum wallet downloaded, I followed all the steps. As I set it up, after the part where you set your password it prompted me to fund my wallet with ether. I then ...
- 1
0
votes
2
answers
421
views
Recovering funds in ETH wrongly sent between exchanges to address without contract [duplicate]
I sent some funds in ETH from bitstamp to another exchange and missread the warnings on the receiving end telling me not to send from smart contract addresses, the transaction left and its confirmed ...
- 1
1
vote
0
answers
246
views
Ethminer install error
I want to start mining in windows server 2008
( How to Mine Ether and use Ethereum on Windows?)
everything is going perfectly except ethminer(step 9) says JSON-RPC problem. Probably couldn't connect. ...
- 123
1
vote
1
answer
919
views
Is there a difference between geth and the cpp-ethereum CLI?
I am a cpp dev and i want to have a look at the ethereum code so i chose the cpp-ethereum repo.
Do geth and cpp-ethereum have the same CLI commands? I wasn`t able to find a list of the commands for ...
- 353
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
2
votes
1
answer
220
views
Does Ethereum block stores state, transactions and receipts external to the block?
Does Ethereum block stores state, transactions and receipts external to the block (like in some external storage)? and the block just contains the hashes of State_root hash, Transaction_root hash, ...
- 133
2
votes
1
answer
710
views
Any export keyword in Solidity?
As per documentation we have import features, but do we have any export to file feature in Solidity that I can use inside my smart contract.
Got a similar thread at How to export transactions into a ...
0
votes
1
answer
30
views
What should I do if I want to add a new method to the token that has been deployed to ethereum [duplicate]
I have issued a token in the ethereum,but now I need to add a new function to this token,Is there any good case to refer to?
- 61
0
votes
1
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122
views
Mist Wallet - I Messed Up
I sent almost 3 ETH from my Bitfinex account to a wallet on Mist. I had just downloaded Mist and was not familiar with the Addresses.... I accidentally sent this ETH to my Mist wallet on the Rinkeby ...
- 3
0
votes
1
answer
76
views
Can i transfer ETH from coinbase to my etherhwallet? [closed]
I have ETH in my coinbase acct, can I transfer them to my etherwallet acct? How can I do it?
- 1
0
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3
answers
385
views
Can one receive (fractions of) ETH by simply running Mist?
This document about Ethereum briefly explains how decentralized Apps work:
To connect to the network, [people] installed a special program called Mist. (...) Every participating computer receives a ...
- 101
1
vote
1
answer
446
views
Tried to send ethereum to contract address, get error in etherscan (gethdebugtrace)
I sent ethereum to a contract address I made and I always get this error:
An error occurred during contract execution: exception
What is going wrong here? I used the exact same code provided on ...
- 11
0
votes
2
answers
5k
views
Can't send my ETH from Nano S
I've tried three times, keeps cancelling for running out of gas. I can't change the amount of gas, it's static at 21000. Honestly not sure what to do.
- 1
0
votes
1
answer
220
views
Remix: Trouble naming a function parameter?
pragma solidity ^0.4.0;
contract SignatureStatus
{
string documentIDhash;
struct Signature {
string documentID; //ID of the document
string studyID; // ID of the study the ...
2
votes
2
answers
235
views
Is it possible to be part of the Ethereum network only as a client, without storing the whole blockchain inside your app?
I would like to create a desktop app which can send / receive transactions on the Ethereum network. But that would be only one feature of the app. It would have several other features. An example ...
- 21
1
vote
3
answers
904
views
How could I write "sendrawtransaction" in Python?
Since I am using web3 = Web3(HTTPProvider('https://mainnet.infura.io/root@123'))
That's why I have to use sendrawtransaction for ether transaction . Now what is the process of write ...
1
vote
0
answers
126
views
Coinbase time limit between transfers
Just wondering if there is a time limit that has to be reached between transfers from Coinbase to MyEtherWallet. Trying to send 0.1 ETH from Coinbase and I get to enter the destination address, the ...
- 11
1
vote
2
answers
297
views
what is the ethereum live network?
By which I can connect the ethereum live network.
web3 = Web3(HTTPProvider('http://192.168.3.48:8045'))
Here I want to put a ethereum live network .
1
vote
1
answer
206
views
I want connect ethereum live network, Is this right?
I write "eth" in the terminal , then run it . Then I write in my django code.
web3 = Web3(HTTPProvider('http://localhost:8545'))
web3 = Web3(IPCProvider())
web3.eth.getBalance('...
0
votes
1
answer
381
views
user api to exchange eth token and wallet address creating using code
Is there any API to help exchange ether or tokens online which will help in coding an exchange.
For bitcoin one can generate a wallet address, is it possible to generate a wallet address for Ethereum ...
- 3
0
votes
1
answer
656
views
Geth says it's synced, but is about 50 blocks behind everyone else
So I run a small eth mining pool and the eth node says it's synced, but when I compare the block to the ones on other pools we are about 50-100 blocks behind. When I check in geth it says it's fully ...
- 1
3
votes
0
answers
501
views
SSL Support for Communication Between Geth Nodes
We are using private Ethereum network for a multi entity use-case. The problem is that all these entities geth nodes sits behind a firewall which only allows TLS traffic.
The node that's broadcasting ...
- 1,259
1
vote
1
answer
1k
views
How to tell ethminer the specific account/address where Ether should be put in?
On the farming machine i have two accounts:
> geth account list
0x.......1
0x.......2
i've started ethminer with ethminer -G and the Ether lands in the first account. But i want it being ...
- 327
1
vote
1
answer
637
views
Can Ethereum network exist without ETH currency?
Theoretically speaking, is ETH currency necessary in the future to run the Ethereum network with all its possibilities like Dapp and Smart Contracts?
I understand that you need to pay gas to miners, ...
- 113
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 ...