All Questions
Tagged with cpp-ethereum blockchain
27 questions
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
4
votes
1
answer
649
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 ...
- 33k
4
votes
1
answer
538
views
Does Eth have an equivalent to Geth's --fast flag?
In a previous question, I asked how Geth's --fast flag worked. I'm now moving over to using Eth, so my question is: is there an equivalent option to allow Eth to quickly sync the block data? If so, ...
- 38k
4
votes
3
answers
2k
views
Why write an EVM in bytecode, and not in something like Python or Go?
I know that Ethereum runs in virtual byte code and there's a javascript-like wrapper language called Solidity. This question is about why the developers chose this approach?
What makes it infeasible ...
- 1,065
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
3
votes
0
answers
574
views
How can i confirm transaction in geth from other peer of blockchain?
I have a query , I have create a private blockchain in which one geth node1 is use for transaction taking and other one(node2) is for mining .They are peered with each other and perfectly ...
- 782
2
votes
2
answers
476
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 ...
- 167
2
votes
2
answers
574
views
Identify the block which contains a tx
I am deploying a Smart Contract to a private blockchain. Is it possible to get when your node receives the smart contract? Is it possible to identify the block which contains the smart contract? how?
- 511
2
votes
2
answers
2k
views
Delete/hide ETH address on Ledger Nano S
Is it possible to delete / hide one of ETH addresses that my Ledger Nano S is providing after logging via MyEtherWallet?
I know ledger is allowing me to use lots of addresses. It is displaying the ...
- 21
2
votes
0
answers
47
views
geth full node is too slwo.Only about 50 blocks can be synchronized per minute
geth full node is too slwo.Only about 50 blocks can be synchronized per minute
However I use snap mode to sync very quickly.
Unfortunately what I need receipts for all transactions.
this is my server:
...
- 21
2
votes
0
answers
500
views
Hashing Algorithm Equality in zk-SNARK [closed]
I am looking to implement the zk-SNARK capabilities of Ethereum to allow a user to prove that they have all the components required ('a', 'b', 'c', 'd') to create a publicly known hash 'x'. My general ...
- 21
2
votes
0
answers
265
views
Need help to run a function on contract but get Big Number error [duplicate]
var myContract = web3.eth.contract(abi)
var myContractInstance = myContract.at(address)
myContractInstance.func.call()
Get Error:
new BigNumber() not a base 16 number:
EDIT:
if anyone comes ...
- 21
2
votes
0
answers
54
views
How to clear Ethereum chain data on windows? [duplicate]
I'm using the ethereum wallet, which uses geth. I keep getting the time out of sync error message. I know i need to clear my bad chaindata. How do i do this?
- 115
2
votes
0
answers
29
views
Block data duplication when moving from Geth to Eth (or vice versa) [duplicate]
I've so far been using Geth (the Go client) as my client of choice. I'm now interested in using the Mix IDE, a requirement of which is that I use Eth (the C++ client) instead.
I've already synced the ...
- 38k
1
vote
0
answers
75
views
Uniswapv2 "quote" ABI
I am trying to sign contractof Uniswapv2 on ethereum mainnet using "quote" ABI. the function is
quote(uint amountA, uint reserveA, uint reserveB)
I use c++ to make the raw transaction and ...
- 69
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
1
vote
0
answers
126
views
What is a sealer and what is the difference between Ethhash, NoProof and BasicAuthority sealers?
Default sealer in cpp-ethereum is NoProof:
https://github.com/ethereum/cpp-ethereum/blob/43bae2c78e2a968ef4eb37bec2da4d9b85fa2392/libethcore/ChainOperationParams.h#L73
But I don't understand what is ...
- 270
1
vote
0
answers
70
views
What do the progress bars on the Alethzero "blockchain download" window mean?
I'm exploring Alethzero. What do the progress bars in the "blockchain download" window mean? I'm seeing this:
I'm assuming this relates to the progress in dowloading the blockchain but I can't work ...
- 8,618
0
votes
1
answer
261
views
The "why" of immutable contracts [duplicate]
I'm new to blockchain technologies and I'm trying to grasp the "why" and the real "value" of immutable contracts.
In software engineering is pretty much accepted that no piece of logic is ever ...
- 167
0
votes
1
answer
100
views
web3py Force send eth transaction at the same block without conformation or any errors
My question is how to force send a transaction via web3 or any other way without paying attention to errors. I know that I will pay for the commission if I am not successful and that will suit me. I'm ...
- 33
0
votes
1
answer
25
views
I want to retieve data from contract A that has been already stored in the contract B by contract A?
dex.sol(contract A)
//SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
import "./storage.sol";
contract dex1{
storage_contract public contractaddress;
constructor(address ...
- 71
0
votes
1
answer
27
views
Which ways do I have to get ethereum node?
I want to know which ways I could get ethereum node besides setting up one on my own server.
I need node in order for my application to work with ethereum blockchain.
- 9
0
votes
0
answers
18
views
Private Node Network-GoEth
i am trying to install private network of three nodes on my single laptop.
i did following:
install go-eth.
used a medium article and followed instructions
when i try to connect nodes with each other,...
0
votes
1
answer
459
views
Some one make a fake token transfer from my friend wallet without having his PK
Now how is that possible? https://etherscan.io/address/0x781C2EA34506d904573E7E92be19154B729B2EE5#tokentxns
this guy send 65 ETH to an address but some scammers sent 65 ETH token(fake) with his ...
0
votes
1
answer
158
views
How to use web3 to send ETH from wallet A to wallet B through an intermediary Smart Contract?
I want to send eth from 1 wallet address A to wallet B address but through an intermediary Smart contract, what should I do? I don't know how to solve that problem yet.
EX: https://bscscan.com/tx/...
0
votes
1
answer
159
views
plug our own consensus in any one of ethereum client? [duplicate]
Actually i try to add new consensus and will through modifying some consensus to see its effect on transaction throughput.
so what platform should i use that provide me this facility or should i use ...
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