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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Why are other sell limit orders being filled before mine on exchanges like gdax?

If I place a sell limit order for ETH/BTC for 4 ETH at 0.07086, when there’s currently only 0.5 ETH on it. It becomes 4.5 ETH total. Then I see it start flashing up and down, up to 10, or 20, then ...
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How to store private data in blockchain and smart contract

Following my previous question on this topic Is there a way to store and share a private key through blockchain?, I might have a solution but I would like to improve the process. Image that A is the ...
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298 views

What is the status of smart contracts in bitcoin?

Are contracts described here already available for use? This source claims that "Ethereum style contracts" will be available in June. Is this correct? How are Ethereum style contracts different from ...
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350 views

Smart contracts in bitcoin

Is it possible in bitcoin to start a smart contract preloaded with some amount of money. And if some other user is ready to pay to the smart contract a certain amount of money, the smart contract ...
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273 views

Blockchain, smart-contracts and migration

I'm investigating what blockchain technology to use for basically intercompany asset management assets like laptops, shares, intellectual property and other, more complex contracts where party X ...
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114 views

eth says that I just mined something: now what?

I'm using eth to GPU mine for Ethereum. After running for 10 minutes, it said: i 23:58:32|gpuminer0 Mined #7a877124… (parent: #d4e56740… ) If this were Bitcoin, I'd go check it out on ...
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62 views

Is it cheaper to store data across multiple instances of the same contract?

From what I understand, code is deduplicated on the Ethereum blockchain by storing pointers in new blocks to blocks containing code that is being reused in the new block. If that's the case: Is it ...
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383 views

If the nonce is 32 bits why the proof of it is difficult?

I want to know why mining of nonce is difficult? The nonce is 32 bits (4294967296) and a high level Nvidia graphic card can check and mine it in a second. why do we need a pool to mine a blockchain?...
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101 views

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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952 views

Restore Wallet From Jaxx to Coinomi: ETH missing (but BTC and LTC are fine)

I have some BTC, ETH and LTC in a wallet created with Jaxx, but I want to use Coinomi instead. I downloaded Coinomi and chose Restore Wallet and entered my 12 words. My BTC and my LTC popped right up, ...
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3answers
7k views

How much can I earn with AntMiner S7 miner

I have started to learn about blockchain technologies, BTC and other crypto-currencies and right now interested in mining. I know that mining of BTC is not very profitable right now, but other ...
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100 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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746 views

Why are Virtual Machines used in Ethereum?

I'm wondering why the Ethereum Virtual Machine (EVM) is used? What if they didn't use it? Why don't we have them in Bitcoin?
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Can blockchain be used for auditing?

It has been argued that with the use of blockchain in auditing, the transaction and the record of the transaction will be the same thing. What does this mean?
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248 views

Transparent Crypto Bitcoin 2.0 Technologies vs Anonymous Bitcoin Crypto 2.0 technologies?

I'm still doing more research on Crypto 2.0 or Bitcoin 2.0 technologies and still weighing the pros and cons of each. So far we have the following technologies that are either backed by a company or a ...
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1answer
39 views

Can I use lightning for ERC-20 (Ethereum coins)

Just finished setting up my lightnig node. It is awesome!! Does anybody knows an implementation or documentation that explains how to make it work on rinkeby or ethereum mainnet?
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116 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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HyperLedger Fabric from IBM is fork of Tangle or Etherium?

I read as if HL Fabric was the most interesting thing ever created on the use of blockchain, but when I read the documentation (very short) about Hyperledger Fabric I came across some coincidences. ...
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209 views

Are Ethereum Tokens issued in an ICO similar to stocks on a stock market? [closed]

Are Ethereum Tokens issued in an ICO similar to stocks on a stock market? In which ways are they similar, and in which ways are they not? To give some background to my question. I just joined an ICO ...
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Is there any address monitoring application with support for multiple cryptocurrencies? [closed]

This would be beneficial for all long-term investors who have many different cryptocurrencies in their portfolio and don't usually perform any transactions. Simply just to check whether your money are ...
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1answer
277 views

DAO Dividends In Ether?

A friend of mine told me that The DAO pays dividends in Ether. I can't find this anywhere, but assuming that it's true, how is this possible that it pays dividends if a person purchases The DAO ...
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1answer
236 views

How to start programming using Ethereum?

I'd like to listen opinions of people that have created already their own working contract. What have you read at the beginning and then? What was the most powerful source that helped you understand ...
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1answer
34 views

How to model randomness in validators selection in PoS?

I searched a lot here and on the Internet to figure how how randomness selection of validators in PoS works? I understand it is a random selection based on fraction of stake a validator has, similar ...
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37 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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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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2answers
64 views

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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128 views

ETH smart contracts v/ traditional

total newb here. I purchased some ETH on an exchange which uses smart contracts, it is in that exchange wallet. I have another wallet which does not support smart contracts, only "traditional" ETH ...
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Download Bitcoin, Etherium, Ripple rates 1min candles

is there any possibility to download archive with rates for Bitcoin, Etherium, Ripple VS USD? I need 1m ... 1w candles. I would like to find such service and download it on daily basis.
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92 views

ETC vs ETH how do I know the difference?

How do I know if Ethereum is ETH or ETC, when the exchange just offers "Ethereum"
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245 views

Who managed bitcoin and ethereum decision making? Who approves Bitcoin upgrades and forks?

To my knowledge in Bitcoin and Ethereum decision makings are decided by the miners and developers. I like to know who makes the final say on the approval of a change to Bitcoin/Ethereum code or ...
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1answer
317 views

How do I securely store different CryptoCurrencies?

I may be seen as a newcomer and and a non-tech-savy person for asking this, but after serveral hours combing the internet, I now have to admit my defeat and ask the question instead of just finding ...
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1answer
80 views

Are for-profit companies possible in Ethereum?

I am getting my head around DAO in Ethereum. In a magazine I read: In principle you could programme a taxi company that bought cars and paid drivers to run the cars to make a profit in order to buy ...
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1answer
187 views

Can I Hook Up RX-460 to Regular PCI Slot via PCI-E Riser

I have motherboard with 3 Regular PCI slots beside 3 PCI-Express slots. (https://www.asus.com/Motherboards/M4A88TDV_EVOUSB3/specifications/) Can I Hook Up 3 RX-460 to Regular 3 PCI Slot via PCI-E ...
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361 views

What data is available to Ethereum smart contracts?

I'm wondering - what data is available to the Ethereum smart contracts? I stumbled upon some tutorials on how to write the contracts that give some indication as to a few examples of the data is ...
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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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32 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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138 views

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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67 views

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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238 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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28 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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163 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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1answer
159 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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Can any one suggest me what is the valid process for Issuing Token in ICO

Can anyone suggest me what is the valid process for Issuing Token in ICO? Actually, I have seen some ICO that send Tokens after some delay (some time 48 hrs). I just want to know that what is the ...
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1answer
2k views

Tax implications of withdraw fee from one exchange (Binance) to another GDAX/Coinbase

I transferred 0.2 ETH and 0.3 ETH in separate transfers from GDAX to Binance (GDAX does not charge a fee for this). Then, I transferred back from Binance to GDAX all 0.5 ETH, but since Binance ...
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1answer
119 views

How is ethereum related to bitcoin?

Is ethereum related to bitcoin? does any one know weather they are related or not.
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39 views

Has Crypto Domain ETH.com Been Sold? [closed]

The domain name is listed for sale on a marketplace namely Uniregistry Market. Thus, it is Ethereum(dot)com for sale about $10 million. Check here to read more: Ethereum(dot)com for sale
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Looking for a generic wallet solution with focus on security

As above, I am looking for a coin agnostic wallet solution with all basic functionalities of a wallet, particularly multi-sig. Primary coin focus is on bitcoin, bitcoin cash, bitcoin gold, ethereum, ...
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270 views

Adding Nano S Ledger hardware wallet to Parity wallet

I used to have this here, but accidently told it to forget the contract. Now I want to add it back, but it doesn't show up. I have followed these steps: https://github.com/paritytech/parity/wiki/...
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502 views

Random election proof of stake

There are currently many cryptocurrencies based on PoS (Proof of Stake). All these PoS algorithms differ from each other. Some or maybe all of them (I don't know) implement some kind of random ...
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Fastest way to transfer funds from Ethereum address to Bitcoin address [closed]

I have an Ethereum address with some Ether in it, and I would like to transfer some of those funds to a Bitcoin address. I am wondering what's the quickest and most painless way to perform the token ...