Questions tagged [clients]

tag used for any topics on unspecific ethereum clients which allow interaction with the blockchain and smart contracts.

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42
votes
4answers
19k views

What exactly is an Ethereum client and what clients are there?

What exactly is an Ethereum client? Is it a full network node that can post transactions to the blockchain (if that is the correct lingo?) or could it also be a light JS client that connects from a ...
3
votes
2answers
306 views

Will a smart contract get deleted once Geth's console is closed?

Is there anyway to deploy a contract permanently on my private chain? I tried the greeter contract and closed the console. After running the console again and trying to invoke my greet function I ...
2
votes
1answer
1k views

Problem with ether mining, stuck in DAG generation loop

i am completely new to ether mining, recently attempted to mine some ether using my desktop. I came across a comprehensive guide from this link: https://www.cryptocompare.com/mining/guides/how-to-mine-...
0
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1answer
26 views

How does Geth query the blockchain?

This question has probably been already answered somewhere else but I didn't find anything on the internet so I'm asking here. I wonder how clients such as Geth query the blockchain to get specific ...
15
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5answers
3k views

How to experiment with Ethereum without downloading the entire blockchain?

I want to experiment with Ethereum without having to download the entire blockchain. My ISP limits my bandwidth to 50GB and downloading the ETH chain would consume a lot of that, not to mention the ...
5
votes
1answer
70 views

Ethereum client implementation

I think to better my understanding of the EVM and underlying file system, I want to read through one or more ethereum client implementations and potentially build a client myself. So far I've been ...
2
votes
1answer
86 views

How does Smart Contract client work?

I don't understand how a client works. I try to explain my doubts. Since a client in the classic client-server paradigm is a lightweight application, I don't understand how this application can use ...
2
votes
1answer
165 views

Invalid transaction signature on sending transaction

Hello guys I'm having a "Invalid transaction signature." error. Can't get pass this one. Am I missing something? client, err := ethclient.Dial("path/to/geth.ipc") if err != nil { return err } ks :...
3
votes
2answers
321 views

Are there different clients for Quorum compared to Ethereum?

Is it correct to say the following? Ethereum clients run Ethereum nodes. Geth and Parity are examples of Ethereum clients. Quorum clients run Quorum nodes. Is there an equivalent to Geth and ...
0
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1answer
76 views

Building Ethereum application with in-process client

Most applications connect to an Ethereum Node through RPC, using a library like Web3.js and Nethereum. That introduces a need to deploy a full node side-by-side with the application, be it on the ...
0
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0answers
37 views

Building Prysm on Windows

I'm currently following the steps to build Prysm from the instructions on Github: https://github.com/prysmaticlabs/prysm At the step for building the beacon chain I ran this command: bazel build //...
1
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1answer
20 views

Does nodes have maximum limit of transactions

Does geth/parity nodes have a maximum limit of transactions that they can have (in queue) after which they stop accepting transactions (or apply back pressure or something)
2
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1answer
349 views

Do different ethereum client have their own EVM? How to guarantee their consistency?

Ethereum wiki introduced many different ethereum clients. https://github.com/ethereum/wiki/wiki/Ethereum-Virtual-Machine-(EVM)-Awesome-List go-ethereum A popular Ethereum client with its own EVM ...
2
votes
1answer
98 views

Must precompiled contracts be natively implemented?

Instead of just having special native code for each precompiled contract, a client could have special gas metering for those (as it is their main purpose) but keep the logic as EVM instructions. ...
1
vote
1answer
90 views

What's the difference between the Parity-Ethereum and the Parity client?

If you open https://etherscan.io/nodetracker you can see that the second most prevalent Ethereum client is Parity-Ethereum followed by Parity. What is the difference between these two client types?
0
votes
1answer
29 views

Who Receives An Event?

I have a smart contract that emits an event, and I've set-up a listener in my client-side app that can register this event. But I'm curious, who receives this event? If say 20 different people from ...
2
votes
1answer
48 views

“Elkrem:” Does it install an Ethereum client on a micro-controller?

I have read this article which describes the prototype of Ethkrem, a development board for IOT and Ethereum: https://devpost.com/software/elkrem-development-board-for-iot-ethereum . However, it is ...
20
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5answers
26k views

How do you stop a running geth node?

I can not figure out how to stop a running geth node without killing the process. I tried to lookup geth help but there is no mention of stopping, halting or any shutdown command. How to shutdown ...
7
votes
1answer
149 views

Will Eth 2.0 be implemented in geth (go-ethereum) or will it run on a new client?

Geth is the official implementation of Ethereum based on the coding language Go. Currently, there are 8 teams that are building Eth 2.0 https://www.coindesk.com/next-gen-buidlers-the-8-teams-working-...
24
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3answers
7k views

Which database(s) do the ethereum clients use and why?

Ethereum clients (such as geth, eth, pyethapp, ethereumj, and ethereumH) download the Ethereum blockchain from their peers and then store a copy of it locally, presumably indexed within some sort of ...
16
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5answers
16k views

Is there a C# implementation available for Ethereum?

Is there a C# / .NET / Mono implementation available for Ethereum to interact with nodes and/or the blockchain?
36
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6answers
12k views

What caused this error: Attempting to run transaction which calls a contract function, but recipient address is not a contract address

I have a contract and a set of mocha tests. I recently switched from using the ethereum client that comes with truffle (the one you get when you run truffle develop) to the ganache-cli. Somehow, in ...
3
votes
2answers
144 views

Is web3.js an Ethereum blockchain client?

Reason is that I wanted to know what Ethereum blockchain client uPort uses and someone said it's web3.js. I haven't understood this concept enough since I was expecting something like eth, geth or ...
6
votes
2answers
816 views

Generate contract address using nonce

Good day, I was looking at the way contracts addresses are created and it seems that the process is quite deterministic (depends on the nonce). Is there a way to get the address of a contract that ...
0
votes
0answers
14 views

How much data to run Ethereum-Wallet-macosx-0-11-1.dmg?

The latest Ethereum client release (yes they actually release a client) is Ethereum-Wallet-macosx-0-11-1.dmg at https://github.com/ethereum/mist/releases If I install and run that software in the ...
3
votes
1answer
220 views

Trace transaction with Go client

I need to call the RPC method debug_traceTransaction but it's not present within the Go client. I'd add a method that performs the call to the RPC endpoint but I'm wondering if there's a reason ...
10
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4answers
3k views

Does parity include a console?

I can run geth console to get a command line interface spawned after launching geth. Similar also works for eth. I tried parity console but that didn't work out. ~ $ parity console Invalid ...
1
vote
1answer
31 views

What is the difference between an Ethereum client and Ethereum API?

Pardon me if this is silly, but as per my limited observation, the number of APIs is higher than the number of clients that exist. How are APIs different from clients?
1
vote
2answers
254 views

How does ethereum bypass the NAT

I wonder, since Ethereum is based on a decentralized p2p network, how does it get through the NAT Firewall? There is no server Ethereum can connect on, so there has to be a way for nodes to accept ...
1
vote
0answers
17 views

What is the main difference between “light client” and “client” in sense of “functionality” and “capability”? [duplicate]

What is the main difference between "light client" and "client" in sense of "functionality and capability" ? I mean, what can a client does that a light client cannot ? (ex. sending transactions? ...
1
vote
0answers
33 views

Is “EthArmbian” an OS for running Ethereum client on “micro-processors”?

Is "EthArmbian" an OS for running Ethereum light client on "micro-processors" or "micro-controllers" ? And if yes, which micro-processors ?
2
votes
3answers
56 views

What kind of micro-processor / micro-controller are able to run Blockchain light client?

Is there any kind of micro-processor / micro-controller that can run Blockchain light client? An example can be Samsung ARTIK: https://www.artik.io However, it's too big. Is there any other similar ...
3
votes
2answers
121 views

Who uses an Ethereum client directly? (Eg, using Geth)

Why would you run an Ethereum node locally when there’s so many tools meaning you don’t need to? From what I can tell, no one is setting up a node locally for mining (takes a specialised mining setup ...
2
votes
1answer
172 views

eth.blockNumber does not match any network's current block

I set up a geth full node on Rinkeby with the following command: /usr/bin/geth --syncmode fast --nousb --cache 3072 --trie-cache-gens 1024 --rpc --rpcaddr 127.0.0.1 --rpcport 8545 --networkid 4 2>&...
8
votes
1answer
5k views

How to connect Ethereum RPC Client to a remote server?

I have Ethereum node running the JSON RPC server on this IP example 136.10.164.134 . Then I want to use a client to push some data. I see this library to make the client. But I can't connect to my ...
3
votes
3answers
901 views

cannot find package “github.com/ethereum/go-ethereum/ethereum”

I was following this youtube video in order to install Ethereum client on Ubuntu 15.10 First I installed Go language environment. Then I have build QT following this wiki After that I tried to ...
3
votes
1answer
394 views

How to introduce new consensus protocol for the Ethereum based application?

I am developing a Blockchain based application using Ethereum. Can I introduce my own consensus protocol for the application. Any suggestions would be appreciated. EDIT : Or will it be possible to ...
0
votes
1answer
37 views

Is the whole ethereum's source code stored in its clients?

I would like to edit the ethereum's source code and add it some improvements. I could find only ethereum clients source code (in java,cpp, python and go). is the whole ethereum's code stored in its ...
9
votes
0answers
2k views

geth vs parity - quantitative comparison [closed]

How do geth and parity Ethereum nodes compare in terms of: Speed How long does it take to sync with the main net, in both fast and full modes (if possible) Disk space needs What is the size of the ...
4
votes
2answers
127 views

Calculate how much space can be saved after self-destructing a contract

I want to do some brief analysis to quantify how much one could free when self-destructing a contract. How could I calculate how much space can nodes save when selfdestructing a given contract? I ...
3
votes
3answers
1k views

How to sync pyethapp (python ethereum client) with the mainnet?

I just installed pyethapp. However, I'm unable to sync the blockchain. Here is what I get when I run the client: 0 ✓ user@host ~ $ pyethapp run Failed to import scrypt. This is not a fatal error but ...
34
votes
1answer
238k views

How to Mine Ether and use Ethereum on Windows?

Which programs should be installed and what do you need to do to start mining Ether and use Ethereum?
3
votes
1answer
38 views

Are there readable reference implementations for the cryptographic primitives used by Ethereum?

For example, this Python file implements SHA3 in a compact and very readable form in Python. I wonder if we have those compact implementations for the primitives used on Ethereum, in special Keccak (...
16
votes
4answers
5k views

How do Ethereum clients generate unique addresses?

How do Ethereum clients, like Ethereum Wallet or Eth-Lightwallet, generate unique addresses that haven't been used before, and what is the likelihood that these addresses have been used?
3
votes
3answers
4k views

How to Unlock account via web3js without geth(web3-extended doesn't work)

Need to unlock account to call contracts functions on client side. So i need to use web 3 or web 3 extanded. But it doesn't work.Method are not availebly. Maybe you know some others ways how to call ...
3
votes
0answers
26 views

Does any client maintain a mapping of hashes to addresses?

As explained in the Design Rationale wiki: Using sha3(k) as the key in the "secure tree" (used in the state and account storage tries): this makes it much more difficult to DoS the trie by setting ...
1
vote
1answer
25 views

What would happen if someone tried to use Ethereum with a modified version of the client?

Let's say that I try to use Ethereum with a modified version of the client which does not follow all the rules of the protocol. What stops my client from being able to damage the Ethereum network?
7
votes
5answers
2k views

Can I use Ethereum on my mobile phone?

What are the options to use Ethereum on my mobile (Android) smartphone? Is there a "mist for mobile"?
5
votes
1answer
285 views

Is it possible to run a client behind an onion address?

It is possible to run a bitcoin client which only connects to onion nodes in the TOR network, like that: ./bitcoind -onion=127.0.0.1:9050 -onlynet=tor -externalip=ssapp53tmftyjmjb.onion Is something ...
2
votes
1answer
68 views

question about the network of blockchain

Tell me please. with whom does the first interaction occur when starting the client \ wallet? I'm trying to understand how the client works. Blockchain is a decentralized system, but if it needs to ...