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Questions tagged [ethereum]

A blockchain-based "smart contract" system with a Turing-complete contract programming language. Questions about Ethereum can also be asked on the dedicated Ethereum site: https://ethereum.stackexchange.com.

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Is it possible to create an application on a block chain without a native coin

Hello guys I've been pondering on some idea of creating a forex broker which will work on a block chain but i have some worries which I'm confused about... How can transactions go on in my broker if ...
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What are different between peers and remote in ethereum wallet? [migrated]

I run ethereum wallet on my Windows 10 PC, sometimes it displays "1 peers", and sometimes it display "remote", would you please see the image? What are different between peers and remote in ethereum ...
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Are there any smart contract systems that are self executing without the need to have an external process to initiate a smart contract?

Doing some research on smart contract systems. I want to create a self executing smart contract that can monitor external data like say the weather from an api. Currently ethereum and other smart ...
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1answer
25 views

What is single member blockchain?

I just heard about single member blockchains like quorum and hyperledger-fabric. So what does single member mean? Is this some kind of restriction or what?
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1answer
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Ethereum alternative to bitcoind

A client have payment system that uses bitcoind wallet / daemon. I know he can expand to litecoin / dogecoin by just copy litecoind / dogecoind then console commands are almost the same. I am ...
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1answer
29 views

How to connect to blockchain via a “rig” miner? [closed]

I would like to connect the following rig (please see the photos) to a blockchain platform (I prefer a platform which is simpler to use :) ). Maybe this rig would not be appropriate for Bitcoin, but ...
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1answer
36 views

Create wallet address on user registration for trading platform

I am creating a crypto-trading platform . I wanted to know how to create wallet address dynamically for all new registered user and also create new address for every transaction. I am using bitcoind ...
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2answers
69 views

How does blockchain technology handle the actual transaction data?

My understanding of how a transaction is secured in blockchain, especially in bitcoin, is that the output of transaction data is locked to the recipient's address (a shorter version of his public key)....
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1answer
44 views

Differences/similarities of “Bitcoin script” and “Ethereum smart contract”?

Can we compare Bitcoin script and Ethereum smart contract ? And if yes, What are differences/similarities of Bitcoin script and Ethereum smart contract in sense of functionality, architecture and ...
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4answers
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Exchanges and security

How can I ensure that my crypto-assets are secure when trading in a certain exchange? Even when I have my private wallet, I should deposit into theirs before trading.
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1answer
27 views

Trading ERC-20 based token

The 12th of February 2017 numerai gave 1M NMR to 12K users. NMR is based on ERC-20 (ethereum protocol). I was one of the lucky receivers. A few months later, crypto exchanges started trading with NMR ...
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1answer
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What is the “main” difference between consensus mechanism of Bitcoin and Ethereum?

Bitcoin and Ethereum both use proof-of-work (PoW) consensus mechanism. One of differences between Bitcoin Pow and Ethereum PoW is difficulty level, meaning that while in bitcoin block generation rate ...
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1answer
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how to embed coin prices of my choice in my website [closed]

sorry for bad english, let's just say i want to embed specific price of coin for example ethereum and bitcoin $20 price in my website, in other words it shows $20 rate of btc and eth on my website not ...
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Is it possible for there to be a virus in the blockchain?

can a blockchain ever get a 'virus', that continually replicates itself, continues paying for gas (if on the ethereum network) and survives/self-replicates through the blockchain, similar to viruses ...
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1answer
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Is it possible to deploy a python script on Ethereum Virtual Network or NEO?

Is it possible to deploy a python script as a dApp on the Ethereum or NEO virtual network?
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1answer
26 views

Ethereum's PoW difficulty

Bitcoin's block time is about 10 minutes while that of Ethereum is 15 secs. Both are using PoW at this moment, right? How come Ethereum's block time is so short compared to Bitcoin? Is hashing a lot ...
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PoS and Block Reward in Ethereum

In Proof of Stake system, is there a block reward for creating a block? Is the reward much smaller than PoW based system? Or under the system, all coins are already distributed and the block producer'...
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1answer
47 views

How is a node selected to run Smart Contract in Ethereum

A node that runs a smart contract will be paid with GAS. How is this node selected? I guess this node should be trustworthy. Or multiple nodes are running the same smart contract just to make sure ...
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2answers
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What are protocols in Crypto? What are token protocols?

I understand how Consensus protocols work. They are essentially rules that nodes follow in order to validate transactions and blocks. It seems as if all tokens are their own protocols. So what are ...
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How to prevent 51% attack on newly created coin [duplicate]

I am interested how bitcoin managed to prevent 51% attack in the beginning? I am about to create my own coin and i want miners to mine blocks. but The problem is I am afraid  51% attack might destroy ...
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2answers
60 views

Is there an efficient way to get the last 200 blocks (BTC, LTC, ETH)?

I am looking for an efficient way of getting the last 200 blocks and being able to pull all transactions related to an address. I would like to do this for BTC, ETH, and LTC. Is there any way to ...
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1answer
57 views

bitcoin block size and etherenum gas limit

I understand that bitcoin has a fixed block size (1MB). On the other hand, Etherenum does not seem to have a fixed gas limit. (https://ethereum.stackexchange.com/questions/1106/is-there-a-limit-for-...
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1answer
29 views

Accepting Bitcoin for Services Rendered with Legal Verbiage on Set Coin Price

I accept Bitcoin and Ethereum for consulting work, but would like some feedback for Service Type Agreements that span upwards of a 1-year in an enterprise setting. What's the best method for ...
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1answer
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Is there such a thing as an “ERC20 compatible Ethereum address”?

I believe the answer to be no, but just asking here to confirm. I think the answer is that it is just the software interacting with the address that is ERC20 compatible or not, not the actual address....
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What happens with ETH on swaps like the one from EOS and TRON?

I'm a bit confused about this, I have read EOS and also TRON, which currently are on Ethereum network, will swap soon to another network, and this will drop the ETH price because they need to sell ...
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1answer
103 views

Java mining solution

I am a beginner in mining algorithms and I have a general question regarding the mining using Java language. Does it make sense to use Java to develop for example ETHASH algorithm (or any other) and ...
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1answer
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Would it be possible to create a blockchain that uses only X+ active blocks?

Every blockchain has a beginning, the Block 0 or also known as "Genesis Block". But wouldn't it be possible to have a blockchain or a coin, where only the last 1000 blocks are saved and 1001+ get ...
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1answer
42 views

how EC Public key is generated from the private key effectively

if my private key is 123456789123456789, doesn't that mean I have to dot G point that many times to generate my pubkey? there must be a shortcut to generate pubkey, otherwise the time complicity of ...
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When calling transferEventObservable function for listner it gives error for earliest to latest transaction

I am trying to fetch earliest to the latest transaction then it gives error transferEventObservable(DefaultBlockParameterName.EARLIEST,DefaultBlockParameterName.LATEST).subscribe(...
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1answer
82 views

What's the point of ETHLend?

I am trying to understand what the idea behing a site like ETHLend is. IIUC, I can borrow coins for an interest, the same way I could borrow a traditional currency from a bank. That part is easy to ...
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19 views

In Ethereum ERC20 token , burn token function is not working

I want to burn some token of user which I have assigned during my ICO, but when I calling burnForm function of contract then it is not working . I am using code as below MyToken newAB = MyToken.load(...
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1answer
28 views

Ethereum in Trezor

I understand that each of Ethereum addresses in Trezor represents standalone Ethereum account. But doesn't this bring problems with sharing funds between your accounts? If 100 people send me 1eth on ...
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0answers
23 views

A website that provides API for multi currencies

Can you please help me to find a wallet that provides API for multiple currencies such as: BTC, ETH, XMR, BCH, LTC, DASH. I want to create new address for each of the currencies and check if there is ...
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1answer
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Token vs contract - are they the same?

The Ethereum ERC20 token is also the contract. The token can never live without the contract. The name of the contract is the name of the token. In the code, the keyword is contract and not token. I ...
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Mining beginner asking for advice of what coin to mine

I am new to mining and have recently purchased the following equipment to create my first mining rig: Motherboard: Asrock H110 Pro BTC+ GPU: Nivida GTX1060 Windforce 6GB GDDR5 X6 PSU: Supernova G3 ...
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1answer
35 views

How can we use Blockchain for Land Registration Use Case?

How and where can we integrate Blockchain in this use case? Say buyer and seller visits the registration office with sale deed they prepared. The details in the sale deed is compared by the ...
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1answer
54 views

How are Bitcoin generated in Video Games?

There are a lot of video games out there which reward the player in Bitcoins or other cryptocurrencies for winning the game or achieving a specific objective. But from where does those crypto come ...
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1answer
87 views

Receiving payments from users for over 150 coins

I would like to receive cryptocurrency payments for bitcoin, ethereum, ripple, stellar and over 150 different altcoins via my website. Similar to a cryptocurrency exchange such as Binance, I would ...
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Funds through ICO

Is it possible for a company to raise funds through an ICO even if it is not a startup? For example: Say company X manufactures chocolates but now it wants to further expand its operations and needs ...
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Taxes on Switching Exchanges

If I have 1 ETH and I move it from an exchange to a wallet, or from an exchange to a wallet, is that considered a taxable event? Or only from ETH to something else, then back to ETH?
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46 views

DPOS vs tendermint in Ethereum

what is the difference between DPOS and tendermint? and which one can be used for partially decentralized blockchain ? note i will use ethereum
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1answer
153 views

Fundamentally what is the difference between the EOS and Ethereum platforms? [closed]

I know one platform is owned by a company, block.one which owns 10% of all EOS tokens, I'm aware of their ICO structure and it seems their tokens are used as a sort of API token - some have called the ...
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127 views

Is it possible to create a Dapp on top of Bitcoin?

Is it possible to create a dapp on top of bitcoin similar to how it can be done with ethereum? Can it be just as capable as ethereum?
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3answers
311 views

Does Bitcoin Blockchain solves Byzantine General Problem?

If bitcoin blockchain solves byzantine general problem, can you give an example of how it solves it? Thanks
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2answers
383 views

Ethereum Code bots…Scam or not?

So new I cant even afford to trade crypto's yet, but looking and learning. I came across some Ethereum Code bot, promising 13k a day etc etc...one of those "sounds to good to be true" things really. ...
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1answer
166 views

Questions about blockchains, network trust and why becoming a node? [closed]

everyone, I'm a software developer and I'm striving to understand the concepts behind blockchain and the projects running on them. I'm not sure if this is the correct place to ask these questions, ...
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1answer
123 views

How is Ethash a 'memory hard' algorithm if it utilizes peak GPU memory bandwidth?

According to the Ethash algorithm described here, the computation for each nonce requires a loop of 64 iterations, where each iteration reads a chunk of 128 bytes from a pseudo-random location in ...
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1answer
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Can a cryptocurrency be liquid while it is in its pre-sale, or even ICO

I am planning to run a Coin's ICO for several years, not interested in the gains to be made from selling out ICO in 3 days NO, but interested in using the COin to end Global Poverty as i deem fit. So ...
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1answer
452 views

Why is Ethereum total network hashrate still increasing if there are no GPUS to buy?

The total Ethereum network hashrate is close to doubling relative to its December level. Mining difficulty is also increasing proportionally of course as the total reward per block stays the same. ...
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Does “id” matter in JSON RPC for Ethereum?

At https://github.com/ethereum/wiki/wiki/JSON-RPC "id" is always different for each RPC call and it's a digit. Is this made of purpose, is each have a percise id assigned to it? Or can it be random, ...