Questions tagged [ethereum-classic]
Ethereum Classic is the chain where the DAO rescue hardfork did not occur. This tag is for questions dealing with the differences between the chains, usage of multiple chains, as well as cross-chain interaction.
272
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geth - error when starting the first node - ubuntu
I try to do the steps from here:
https://geth.ethereum.org/docs/getting-started/private-net
I run the first commnad:
geth --datadir="/tmp/eth/60/01" -verbosity 6 --ipcdisable --port 30301 --...
- 125
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0
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make geth fails after cloning ethereum classic repo
After cloning ethereum classic repo, running "make geth" command leads to the following error:
cannot load hash/maphash: malformed module path "hash/maphash": missing dot in first ...
- 317
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How are updates rolled out?
if an update to Ethereum or any other cryptocurrency is rolled out, how to ensure that everyone in the network is running the same 'version'.
Especially if the update is not backward-compatible with ...
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384
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Ethereum NFT minting successful, but still gives this error
I am trying to build a Ethereum NFT minting website where the website users can mint NFTs on blockchain without an external wallet (e.g. Metamask).
I asked a question here before and got reply as to ...
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1
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62
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Is the DAO Hack attacker still full of ether?
I'm actually studying what is happened in the DAO Hack for a research and I'm full of curiosity.
I read a lot of articles on Internet about this but I didn't found enought informations about what ...
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0
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950
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Can I set fixed gas price to Opensea-js fulfillOrder method
I am trying to use openseajs library's fulfillOrder method to buy NFT token. And I want to adjust the gas price to prioritize my transaction. Below shows how I do this.
I pass the tokenId, ...
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1
vote
1
answer
125
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Would it be possible to create a fork of Ethereum or Ethereum Classic where only few smart contracts can be deployed after offchain debates(forums..)?
I would like to know if it would be possible to create a Fork of Ethereum or Ethereum Classic where only few smart contracts can be deployed?
The goal is to create a fork and launch a brand new ...
- 317
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52
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accidentally sent ETC to ETH
pls help I accidentally mistakenly sent ETC to ETH, and I have been reached out to my coinbase and third party and they said they didn't receive it and it showed the transaction details and lost the ...
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0
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44
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startnode.cmd file not recognized
When I opened my folder mygethnode in VSC.
There are only two folders named geth and keystore and 4 json files.
.puppeth folder and startnode.cmd file is not there.
How to edit the parameters without ...
- 111
4
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1
answer
763
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How many blocks were reversed with the DAO hard fork?
There are some facts regarding the DAO hack and the subsequent hard fork that can be found everywhere, e.g., that the hard fork happened at block height 1,920,000, that it was undertaken in an effort ...
- 145
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66
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When Eth Classic was forked off, did the people who held Ether suddenly hold an identical sum in two currencies?
I'm having a hard time understanding forks. What happened to the transactions in the blockchain before block 1'920'000? Are they present in both resulting blockchains, i.e. everybody then had two ...
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415
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Ethereum Keystore Hashcat
I have a keystore file but I can't remember all the passwords.
Then I use Hashcat and I try to crack it with my list of words that I made but I don't know if I use the correct commands.
hashcat.exe -...
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1
answer
1k
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What's the cause of low hashrate on Radeon RX 580 4GB?
I've just started mining Ethereum Classic with Sapphire Nitro+ Radeon RX 580 4GB and lolMiner. While some people have reported that the hashrate should be about 30 MH/s, on my system it doesn't go ...
- 101
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261
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TRANSFER_FROM_FAILED when swapping token for eth with uniswap api
when calling uniswap.swapExactTokensForEth, I get the following error on etherscan:
Fail with error: TransferHelper: TRANSFER_FROM_FAILED
I see previous posts with this error, though they seem related ...
- 33
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1
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292
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I can't access my ETH wallet (made on wallet.ethereum.org in 2017)
In 2017, when I first started to mine, I made a wallet in wallet.ethereum.org (I stopped briefly after, so I have around 2.2 ETH in that wallet).
Now in 2021 I tried to go to wallet.ethereum.org but ...
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1
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30
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I'm here to run the official Go-Ethereum repo. How can i do that?
I want to run go-ethereum in my own PC. Is there any instruction about this? How they deployed it?
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3
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2k
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how to set a require for a string to not be null
I want to write a require condition for string that string variable could not be null. How to write because string is not taking the != operator
function createOrder(address _seller, string memory ...
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3
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158
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Is there a websocket URL in Ethereum classic like in Ethereum?
Can anyone tell me whether or not there is a WebSocket URL to deal with smart contract events in Ethereum Classic especially? I know ethereum supports WebSockets and we can easily listen to events ...
- 409
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1
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2k
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What are the meanings of `(uint256) (a)` and `(int256) (a)` in Solidity
I came across the following code
payoutsTo_[_customerAddress] += (int256) (_dividends * magnitude);
What is meaning of (int256) in this line, and is there any possibility of overflow here? Or here:
...
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174
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Execute a function once for each ID
I need to allow the function caller to only execute the function once for each request ID. So I have IDs and for each ID , the caller can only execute the function once. I need help in a way that is ...
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71
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In Ethereum, is it possible for a malicious client to duplicate a coin by double executing a transaction?
Is it possible a scenario in which a malicious client executes two transactions with the same nonce of a specific account and copies and sends coins?
Suppose users A, B, and C have the following ...
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1
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30
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Simple question about pre/post hard fork of July 2016
I have searched the messages and, while I did find some info on the hard fork, I didn't see my answer. I believe it is because it is such a simple question. Thank you for any clarification you can ...
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110
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Can we use openzeppelin library to make contracts upgrade-able in ETC test net?
I am trying to develop smart contracts to run in the ETC test-net. Beforehand, I am doing some background research and need to know if openzeppelin library is compatible to make things work in ETC as ...
- 409
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2
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11k
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Does ASIC miner works in ETH and ETC
I want to buy an ASIC Miner (A10 Pro 6GB) but i have some doubts.
Is it good to buy an ASIC Miner in Nov. 2020 for ETH and ETC mining ?
Recently I heard that the mining algorithm for ETC is changing ...
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124
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Unable to make private geth node online
I am currently working on building my own private network on Ethereum to build small apps. I am learning as I go so excuse me if this question is very obvious, but I have exhausted myself looking for ...
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0
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65
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In Ethereum what is read tx per second ( not write tx per second )
It is every where documented that how much tx per second ethereum can do (which is for writing) , but I want to know what is possible read tx per second ? and if difference then why
- 389
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27
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Action on Ethereum errors
I am trying to fetch the transaction information from Ethereum and ETC, i have encountered the below errors message .
outofgas
Reversed
badjump destination
bad instruction.
If we have these errors in ...
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0
answers
56
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What does an Ethereum Client do?
I've developed Smart Contracts using Solidity, and then created a front end for them using Web3js. I used Truffle to to get them to communicate. That's how I tried out a couple of Proof of Concepts. I ...
2
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1
answer
108
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Isn't the blockchain size going to be a huge problem in the future? [duplicate]
At the moment the blockchain is already quite large. And since the main idea behind the blockchain technology is to get away from services that provide the information and rather have the information ...
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873
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UnhandledPromiseRejectionWarning: Error: Returned error: The method eth_sendTransaction does not exist/is not available [duplicate]
var Web3 = require('web3')
var url = 'https://rinkeby.infura.io/v3/cadc6b0dc5c54720b973b3720eab5584'
var web3 = new Web3(url)
var RemixContract = new web3.eth.Contract([
{
"constant": ...
3
votes
1
answer
1k
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is it possible for a Ethereum miner to select transaction for processing based on from or to address?
It is commonly written everywhere that Ethereum miner selects transaction based on higher gas price first, so I want to know is it possible for minter to select transaction to process based on from/to ...
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200
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when iam runing npm run dev it showing me this error, how to solve this [closed]
[![shiva@shiva-VirtualBox:~/sta$ npm run dev
[email protected] dev /home/shiva/sta
lite-server
** browser-sync config **
{
injectChanges: false,
files: [ './**/*.{html,htm,css,js}' ],
...
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2k
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ETC Mining - DAG File to big in Phoenix miner but Claymore works without any complains
I am confused, when trying to mine ETC with Phoenix miner, as I did for a long time, it calls the error:
GPU1: Not enaugh VRAM for DAG epoch 329
GPU1 is a RX580 with 4GB, but it is dedicated.
I also ...
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2
answers
52
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Is transaction confidentiality achievable in Ethereum currently
I have read about zk-SNARKs on different articles which is written in 2016. So I am wondering if the zk-SNARKs is implemented in Ethereum currently?
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0
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142
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what is a pseudorandom cache mentioned in ethereum yellow paper
in ethereum yellow paper it says:
"There exists a seed which can be computed for each
block by scanning through the block headers up until that
point. From the seed, one can compute a pseudorandom
...
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1
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676
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Total Unique Addresses Count of Ethereum Classic
I need to find an API giving the total number of unique addresses used on the Ethereum Classic blockchain.
For example, the following API provides it for Ethereum: https://etherscan.io/chart/address
...
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0
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226
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Retrieving the first and latest transaction date of a contract
Etherscan offers a time series of ethereum transaction of a contract address. Is there a way to retrieve this data? For example the duration mentioned here https://etherscan.io/address/...
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1
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138
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ETC - Negative Balance
So playing around with ETC and wondering how in the world this address doesn't have a negative balance?
https://gastracker.io/addr/0x6f1f8a70e2257354e81c306f130f7976dead8e8b
First transactions are ...
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2
answers
354
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How do I create an attribute-based access control in my smart contract to control user access and permissions?
For my Master's thesis, I am trying to create a decentralized file storage system using ethereum, solidity and ipfs. I want to code the smart contract with attribute-based access control but do not ...
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2
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792
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Is there any working provider for Ethereum Classic APIs?
Provider used for Ethereum is Infura, but there is no any provider for Ethereum Classic.
Previously tested Ethercluster endpoint to access APIs for Ethereum Classic, not able to connect with Kotti ...
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2
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667
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How to convert string to bytes256 or arbitrary bytes?
I already know how to convert bytes32ToString and stringToBytes32:
function bytes32ToString(bytes32 x)
public
pure
returns (string memory)
{
bytes memory ...
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2
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2
answers
2k
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Is there any testnet faucet for ETC Ethereum Classic Coin?
Not able to get testing ETC from available faucet https://etcfaucet.info/, is there any other faucet or way to get ETC for tesing?
- 407
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179
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Is there any API to create Addresss and wallet as well as make transfer for ETC (Ethereum Classic)?
There is balance checking, transaction list and transaction receipt getting APIs available for Ethereum Classic (ETC)?
Is ETC coin is only available on Ethereum Classic or its listed block explorer ...
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4
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1
answer
76
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Where’s the equivalent of Yellow paper for Ethereum classic?
Ethereum classic performed changes never implemented on Ethereum like on mining. I do expect them to have their own paper for detailing this.
But it seems it’s not called the yellow paper…
Even on ...
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1
answer
156
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About Ethereum testnet 61 (Ethereum Classic)
I know that Ethereum was forked 2 chains due to DAO hacking. so Ethereum Classic was borned at that time but 2 chains are equal technically.
Network number is different between Ethereum(number is 1) ...
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324
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Solidity: TypeError: Member "unbond" not unique after argument-dependent lookup in contract super EthGatedMarket
I'm getting this error:
TypeError: Member "unbond" not unique after argument-dependent lookup in contract super EthGatedMarket.
super.unbond(msg.sender, gatewaySpecifier, quantity);
^----------...
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2
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1
answer
87
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How is the Ethereum Classic gas limit enforced?
According the the Ethereum Classic Technical Reference:
For security reasons, the amount of gas that can be purchased and used by blocks is limited.
How is it limited? Do miners choose to limit it,...
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1
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1k
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Web3: web3.utils is undefined
I am kinda new to Ethereum and Web3 so I am trying to implement the Ethereum: Building Blockchain Decentralized Apps (DApps) tutorial.
I have already installed web3 and web3-utils.
npm view web3 ...
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43
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Alternative to decentralize exchange on Ethereum?
Because of the block time lag, The decentralize exchanges built on Ethereum suffers from a Front running problem.
Gnosis works on Dutch exchange concept where orders are executed in Bulk eliminating ...
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170
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How to calculate the value of mixhash in block header?
As of my knowledge how POW works is When mining the miner will have the hash1 which is block hash and he need to fine the hash2 which is hash of nonce (a random number).
So that the root hash of ...
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