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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Is Bitcoin a scam or safe to invest in [duplicate]

Is bitcoin a fraud/scam? If not, why are there people constantly calling it a Ponzi scheme, a pyramid scheme or other things similar? Does this indicate that these things have something in common in ...
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Question regarding cryptocurrencies backed by commodities aka stablecoins [migrated]

Anyone know how to peg the price of an ERC 20 token to the value of gold? What needs to be done in the coding of the smart contract? Is there a step by step tutorial somewhere? If I had gold reserves ...
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Why did my ethereum transaction fail? [closed]

A friend tried to send ETH to me in a small test quantity, of course because we're trying to make sure we don't screw up. We're using Kraken and it just plainly failed. No message or something. We ...
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Why exchanges show Bitcoin price higher than actual value? [duplicate]

I trade crypto on indian platform WazirX and CoinSwitch. Both are currently showing price of 1 Bitcoin to be 44,78,353 Indian Rupees ($ 60,605.51) while the price shown on google as well as Binance ...
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1answer
59 views

how to recover funds from blockchain

I forgot my password of Blockchain Wallet and i tried to recover from (12 word backup phrase key but it has generated a new wallet) on the same 12 word backup key and it has different (wallet ID) but ...
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1answer
32 views

Running ERC20 contract on RSK

Disclaimer: originally asked on the ETH SE site, but advised to post here. I have been reading about RSK lately and was wondering about the compatibility and possibilities, so I wanted to ask for some ...
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1answer
69 views

Wallet suddenly shows transactions from someone else

I restored a wallet recently that I have not used in years. Back then, it was only Bitcoin, but at some point Ethereum was added. So now I see all my Bitcoin tx, but on top of that the Ethereum part ...
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1answer
36 views

How wallet handles different cryptocurrencies? [closed]

As far as I know, wallet stores private and public keys and calculate balance according to that. Suppose a wallet(Single cryptocurrency) has 3 keys (private,public). Wallet will find UTXO's connected ...
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1answer
39 views

Blockchain Login

We're working on a research based on the blockchain and I can't understand a point about login authentication. As we all know, blockchain is distributed or decentralized system, there is no central ...
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2answers
78 views

Why are there so many fake cryptocurrency airdrops? [closed]

I started learning about cryptocurrency three months ago and I have come across many airdrops spread by scammers who disappear after many persons have signed up on their platform. Are there ways one ...
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51 views

standard bitcoin wallet vs segwit or native segwit

I bitcoin holder, 1 years ago I bought trezor and ledger and keep on my device bitcoin and ehternum. I noticed that my bitcoin adress is segwit and standard bitcoin adress started with 1... I ...
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35 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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25 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
47 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
151 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
52 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
229 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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1answer
225 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
143 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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0answers
910 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
66 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
78 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
276 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
468 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
159 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
49 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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923 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
59 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
540 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
148 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
196 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
45 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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51 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
89 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
49 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
32 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
80 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
223 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
309 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
317 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
129 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
44 views

Trading ERC-20 based token [closed]

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
118 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
168 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
194 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
95 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
54 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
187 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 ...