Questions tagged [ethereum]

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

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Ethereum vs ERC20 Tokens - What's The Relationship? [closed]

I read that "ERC20 token transactions consume processing power on the Ethereum platform. Processing power costs gas, which is paid for with Ether." Is this true? I feel like it's not. For ...
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28 views

Why Ripple is able to process transaction faster than ethereum and bitcoin? [duplicate]

I was wondering what makes Ripple very fast(Transaction per seconds) rather than Ethereum and Bitcoin? Currently, I'm doing a research on how to reduce transaction confirmation time in blockchain. Is ...
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Is it bad idea to store my passwords on blockchain with a smart contract? [migrated]

I want to save my passwords and some other personal data on a ethereum like blockchain. it seems more persistant to me. I may lose my e-mail , my pc may crush and I may lose my usb stick. But nothing ...
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23 views

Is there any 'Metamask-like' app for Bitcoin? [duplicate]

9 months ago someone asked this same question: Metamask-like web3 inject for bitcoin but I was wondering if there had been be any changes since then. I'm currently looking for a Chrome extension that ...
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1answer
44 views

Crypto wallet for payments with no deposit

We are wondering how we can build a wallet that talks to our website and gives the user the ability to request a withdrawal of his funds. We do not know what is the right question for this type of ...
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2answers
35 views

Problem with data redundancy in block chain

Since the copy of same data is storedon each node in network. Does it use storage space to store same data on each node? If yes then how the data is decentralised. It is just a large network of ...
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1answer
47 views

Could a computer virus made less than a mb, which is sent as transaction that attacks miners? [closed]

What happens if computer virus less than a mb is sent as transaction that attacks miners?
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1answer
199 views

Why are there ETH addresses in bitcoin wallet.dat?

So I have a lot of addresses or pkscript listed in my wallet.dat files that begin with 0014....all...numbers. There is bitcoin address on the same line starting with a 3. When I strip the 0014 and ...
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49 views

contract to exchange bitcoin for eth

I'm thinking about a decentralized service to exchange bitcoin for eth or any other ERC20 token. Probably something that bisq already does. Let's say A wants to sell 1 BTC for 5 ETH to B. Both have ...
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1answer
134 views

Withdraw and deposit in cryptocurrency exchange website

In an exchange website we just book trades in our database and just when user want to withdraw his BTC balance we make a real transaction in bitcoin network for him. Consider a scenario that a user ...
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1answer
56 views

What are some other uses for blockchain instead of money? [closed]

What has blockchain been used for aside from money in the 10 years its been around? I know things like etherium exist, but They don't seem be going anywhere, most of its value seams to come from the ...
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1answer
100 views

Metamask-like web3 inject for bitcoin

Is there a browser extension that works similarly to Ethereum's Metamask? I am wondering that if there isn't one, is it because of some technical limitation, or that just no one has gotten around to ...
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198 views

How is it possible price on Coinbase drops below my Limit Order when it is only partially filled?

I had a post only limit order place for €172 per ETH, about 50% of the order filled before the price dropped to €171.95, leaving my limit order somehow still open? The order was placed when the price ...
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1answer
63 views

Who is a first miner that receive a transaction from end-user?

This is a First Question. As you already know, the blockchain like Bitcoin, Ethereum is a software program based on peer to peer network system. so I am wondering that who is a first miner that ...
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2answers
61 views

Is there a way to take out a loan on your Bitcoin like how Ethereum can be used as a CDP in the MakerDAO to get DAI?

I wanted to sell some BTC to pay some bills, but I also didn't want to lose out on the Bitcoin rise in the inevitable future. Ethereum has the ability to be used as a CDP (“collateralized debt ...
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1answer
182 views

“Fork choice rule” : A general term? or a specific algorithm?

Is "Fork choice rule" a general term including all the algorithms used for choosing a branch among other branches in a fork (including longest chain rule in Bitcoin etc) ? Or is it a specific ...
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1answer
417 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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1answer
83 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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1answer
46 views

Data for time a transaction spent in a pool before it got added to a block

Is it possible to collect data for when an transaction was added to the pool to when it was added to the block?
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670 views

api limit workaround

Are there any ways to avoid limitation for api calls (5/sec)? I need the info about transactions and balance (of certain account), UTXOs and the ability to broadcast my transaction. Currently I am ...
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1answer
55 views

What are the biggest Proof-of-Stake roadblocks? [closed]

What are the biggest hurdles (technological or otherwise) that the Proof-of-Stake consensus algorithm must overcome to become the de facto consensus algorithm for blockchain? Or put differently, what'...
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2answers
419 views

Why did the lightning network implement a gossip protocol?

As pointed out by many lightning developers in the past (e.g. Rusty's 1 million channel challenge) the gossip protocol is quite noisy and a part of the BOLTs causing many engineering challenges. ...
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1answer
131 views

Generator Point G multiple

if in a curve y2 mod p = x3+ 7 mod p ( ecdsa-secp256k1) p=115792089237316195423570985008687907853269984665640564039457584007908834671663 G=...
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1answer
186 views

When does Ardor smart contracts come into effect and how does it work compared to Ethereum, EOS, and Lisk?

Ardor announced they are launching smart contracts on their system and how does it work compared to the other platforms like Ethereum, EOS, and Lisk?
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1answer
41 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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1answer
38 views

Blcokchain corrupt ledger

What happen to the node if we find that node on blockchain has corrupt ledger? Is the ledger sync with other ledger or get discard.
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1answer
79 views

How does using a Turing-complete programming language compromise the security of the network? [duplicate]

I have read many places that the decision for Ethereum to use a Turing-complete programming language sparked a lot of concerns over security. From my understanding, not using a Turing-complete ...
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28 views

Are there any smart contract systems that are self executing without the need to have an external process to initiate a smart contract? [closed]

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
43 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
25 views

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
66 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
155 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
295 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
206 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
115 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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1answer
38 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
104 views

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
76 views

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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2answers
170 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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1answer
89 views

Is it possible to deploy a python script on Ethereum Virtual Network or NEO? [closed]

Is it possible to deploy a python script as a dApp on the Ethereum or NEO virtual network?
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1answer
52 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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1answer
179 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
74 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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2answers
99 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
123 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
39 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
22 views

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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1answer
499 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
28 views

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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186 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 ...