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.
267
questions
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How can I search for a transaction?
I was given some crypto recently. When I try and search up the info for the transaction I'm given:
to: Ox5603F
Price per coin xxxx
network fee xxx
confirmations xxxx
date xx/xx/xx
status ...
- 11
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5
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ETH red from choise wallet owned by myself gone out of my wallet and not arrived
I transferred roughly 8 ETH from my Choise wallet to another address owned by myself three days ago but the ETH has not turned up but has gone out of my choise wallet - the transaction Id does not ...
- 1
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54
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How to calculate the Max Buy and max sell of an erc20 token even without liquidity
How to calculate the Max Buy and max sell of an erc20 token even without liquidity.
There are many Ethereum tokens with a limit to the maximum amount of tokens that can be bought at once and sold.
I ...
2
votes
1
answer
120
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InvalidStatusCode: server rejected WebSocket connection: HTTP 401
I am trying to subscribe to pending transactions on the Ethereum blockchain using this tutorial from Infura: https://docs.infura.io/tutorials/ethereum/subscribe-to-pending-transactions
When I try to ...
- 25
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1
answer
36
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Uniq Random Numbers - Without Chainlink
I am trying to assign unique tickets for users. The user can choose the number of tickets and get an allotment. The allocated tickets will be mapped to users.
pragma solidity ^0.8.11;
contract ...
- 35
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0
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21
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add faucet to metamask failed [duplicate]
I am using meta mask for the second time and I wanted to add some test ethers in my meta mask from test ether faucet in order to deploy my own smart contract implemented using remix. Unfortunately, ...
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votes
1
answer
27
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Solidity Interfaces : VM revert Error
Im implementing a NFT Marketplace. Where I created Two contracts and an Interface. One contract is Tokens.sol and anotherone is MarketPlace.sol In Tokens Contract I Implemented functions like Minting ...
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14
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How much Gas Token used in total Gas?
Users can Mint Gas tokens at a lower price and Free them when the Gas price is high in Ethereum.
In Etherscan, the available information is Gas Used. There is no more information about how much Gas is ...
- 21
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16
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Is Reentrancy Check compulsory while inilaizing the initializeGenesisBlock function?
I have one doubt while initializing a Genesis Block function in solidity smart contract
Question = Is Reentracy Check compulsory while inilaizing the initializeGenesisBlock function ?
function ...
- 21
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13
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Failing to deploy a Yearn.Finance DApp
I am working on building a DApp that interacts with the Yearn.Finance vaults, using the standard ERC4626 standards. This is my first DApp connecting to Yearn.Finance.
During development, I am looking ...
- 101
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2
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573
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EIP-4337 example implementation and source code
Heard about new boi in the town https://eips.ethereum.org/EIPS/eip-4337 .
Read its documentation but it is way too technical for a beginner like me . Can anyone explain it in simple terms ? I read the ...
- 326
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16
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Ethereum classic $ETC emissions schedule as of 2023 March
ETC Ethereum Classic has been running for a number of years now. What is the current emissions schedule for Ethereum classic? Did they ever change the schedule?
- 4,760
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1
answer
39
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How much ETC was stolen in the multiple 51% attacks on Ethereum-Classic?
Ethereum Classic was attacked multiple times back in 2020. How much was stolen and which addresses control these stolen funds now? And have they been sold?
- 4,760
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1
answer
26
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Whata are the differences between Ethereum and Ethereum Classic?
What are the key differences between Ethereum and Ethereum Classic and what implications do they have for the future of the Ethereum network?
- 139
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1
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2k
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Information about Apply mining pool rewards ERC-20 Smart Contract [closed]
I was contacted from a girl of Singapore,she told me to join a website,with 1k of buying USDT erc-20,every day I withdraw 30 dollar,but today I accept this partecipation for the claim the reward but ...
- 1
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13
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Not Able to initalize bundlr for etherum
const privateKey = user_wallet.private_key;
const bundlr = new Bundlr(arweaveUrl, "Ethereum", privateKey );
await bundlr.ready();
Im not able to initalize Bundlr for etherum.
Giving me the ...
- 13
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votes
1
answer
990
views
OPCODES How is work "CALLDATACOPY"?
I try to understand how CALLDATACOPY works.
destOffset: byte offset in the memory where the result will be copied.
offset: byte offset in the calldata to copy.
size: byte size to copy.
I try to ...
- 193
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1
answer
42
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OPCODES Multiplication problem type(uint).max * 2
I try to execute the following opcodes and computer gives me the following result
the code: type(uint).max * 2
the result: type(uint).max -1
PUSH1 2
PUSH32 ...
- 193
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votes
1
answer
17
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Smart Contract internal method return value to caller e.g. angular
Smart Contract internal method (last in chain of public view method) is able to return value at the end for parent method (public view) caller e.g. Angular?
- 135
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2
answers
84
views
What is mint rate in ERC721A?
What is mintRate here ?
contract Contract721A is ERC721A, Ownable {
uint256 public mintRate = 0.001 ether;
function setMintRate(uint256 _mintRate) public onlyOwner {
...
- 326
1
vote
2
answers
392
views
Which is the best proxy contract?
I am learning how to write proxy contract for a smart contract . I am across this article .
Here are many standards specified for writing a proxy contract . Which one of them is "best" ?
By &...
- 326
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votes
1
answer
1k
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Get error `Error: cannot estimate gas; transaction may fail or may require manual gas limit` when send method to contract
I deployed a smart contract to Ganache as below code:
// SPDX-License-Identifier: MIT
// Tells the Solidity compiler to compile only from v0.8.13 to v0.9.0
pragma solidity ^0.8.13;
import "@...
- 236
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13
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Singnificant increase in tx mining from ~1 minute up to ~ 180 - 360 minutes (3 - 6 hours) over last 5 days
Does anyone know the cause of this?
This morning I noticed the significant increase in tx mining from ~1 minute up to ~ 180 - 360 minutes (3 - 6 hours) over last 5 days.
Yesterday I faced with issue ...
- 452
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1
answer
21
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Q&A: How does msg.sender actual address vary during the call?
This part of own Q&A serial of posts which shares knowledge gained during work on one project
msg.sender brought some ambiguity to me as at the first look this is an address of user caller. ...
- 452
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votes
2
answers
26
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Q&A: How to get current time in ms? [duplicate]
This part of own Q&A serial of posts which shares knowledge gained during work on one project
I was looking for a way to do actions link to global time, but obtaining current timestamp was not a ...
- 452
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votes
2
answers
36
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Q&A: How to test contracts under different accounts?
This part of own Q&A serial of posts which shares knowledge gained during work on one project
I was need to test my contract under different accounts and was looking for ways to do this.
- 452
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votes
1
answer
110
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Q&A: How to get a minting token id?
This part of own Q&A serial of posts which shares knowledge gained during work on one project
It is not obvious about how to get a just minted token id. You may assume there would be a transaction ...
- 452
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votes
1
answer
124
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Q&A: Is it possible to delegate another contract right to mint a token on behalf of others?
This part of own Q&A serial of posts which shares knowledge gained during work on one project
My project implies another contract should transfer a token by some condition. Is it possible to ...
- 452
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votes
1
answer
14
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Q&A: Does solidity have any structures besides mapping and arrays? [duplicate]
This part of own Q&A serial of posts which shares knowledge gained during work on one project
I faced with very limited options to express my thoughts and intents on solidity which is partly ...
- 452
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1
answer
7
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Q&A: How can I get an instance of the contract by its address?
This part of own Q&A serial of posts which shares knowledge gained during work on one project
- 452
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votes
1
answer
7
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Q&A: How to get all tokens assigned to a user? [duplicate]
This part of own Q&A serial of posts which shares knowledge gained during work on one project
I was looking for a way to get all tokens which belongs to a user. One more constrains is project is ...
- 452
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votes
1
answer
35
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Q&A: Is it possible to mint many tokens by single call?
This part of own Q&A serial of posts which shares knowledge gained during work on one project
I was curios about options we have to mint a token. Is it possible to mint many tokens by single call?
- 452
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1
answer
9
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Q&A: Which options do we have to overcome the cost of NFT emission (minting)?
This part of own Q&A serial of posts which shares knowledge gained during work on one project
I have to explore alternatives to mint NFT at public ethereum chain because of the cost of minting a ...
- 452
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votes
1
answer
7
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Q&A: Is a token emission free?
This part of own Q&A serial of posts which shares knowledge gained during work on one project
I have to answer question would be ethereum cost of project deployment and usage fit the product ...
- 452
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votes
1
answer
10
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Can we get an estimate of how many ETH ASIC's were there before they all migrated to Ethereum classic?
Many of the ETH asic's have migrated to ETC, but how many estimated machines were produced? If we took the hash rate of ETH before the merge and compared it to ETC before the merge and get the ...
- 4,760
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2
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1k
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Rinkeby authenticated Faucet is saying "insufficient funds for gas*price + value"
I am learning more about the blockchain so I just started a tutorial on Freecodecamp, in the following video I need to test Ethereum from Rinkeby authenticated Faucet, I did the following step but ...
1
vote
1
answer
74
views
How would ethereum migrate a whole transaction history after The Merge?
I have read press release of upcoming The Merge and face with promise to save a whole transaction history without tech details:
No history is lost. As Mainnet gets merged with the Beacon Chain, it
...
- 452
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votes
1
answer
217
views
Gnosis safe transfer function `Approve Hash` but does not transfer erc20 token
I am using the gnosis-safe core SDK here to create transactions to transfer Eth out of a deployed safe proxy. Doc: https://github.com/safe-global/safe-core-sdk/tree/main/packages/safe-core-sdk#...
- 103
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0
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27
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Number of Ethereum transactions per day since 2015
I have plotted the number of Ethereum transactions since 30th August 2015 (around inception). This is how the graph looks like. I expected a trend in which the number of transactions in a day will be ...
- 11
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votes
2
answers
2k
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error deploying with hardhat- config issue
I'm having error in my config file:
Error HH8: There's one or more errors in your config file:
* Invalid value undefined for HardhatConfig.networks.rinkeby.url - Expected a value of type string.
* ...
- 13
1
vote
1
answer
194
views
How many NFTs are hosted on IPFS?
Let me start by saying that I am a NFT noob so I apologize ahead of time if any of this is obvious.
I'm looking to determine how many NFTs are "hosted" on IPFS as opposed to on centralized ...
- 113
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16
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Need your guidance in using mythrill
I am using mythrill for analysing vulnerabilities in smart contract.
Source: https://github.com/ConsenSys/mythril
How many user request for analysing can mythrill python code can handle at a time ?
Is ...
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votes
1
answer
33
views
How can I update my smart contract state when someone sell NFT to aother
I implement ERC1155, in which if someone mints a token I save the TokenId and Address of the address that mint the token.
mapping(uint256=>address) minter
what I want to do when someone on Opensea ...
0
votes
2
answers
170
views
Supported solidity compiler by truffle
Hello I'm working on ethereum project using truffle framework, I want to know what is the latest solidity compiler version supported by truffle.
- 49
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192
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Sent ETH to ETC address within Ledger Nano X - Blind Signing Error when trying to Transfer (have read old threads)
I sent ETH to a ETC Leger Address. I have read the thread "Sent ETH to ETC address within Ledger Nano S. Confirmed on Etherscan, but not appearing in Wallet? [closed]" which has a good ...
0
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0
answers
173
views
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
answers
84
views
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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0
answers
11
views
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 ...
- 11
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0
answers
381
views
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 ...
- 11
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1
answer
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 ...
