Questions tagged [bitcoin]

bitcoin is a digital asset and a payment system invented by satoshi nakamoto.

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Why does a mining reward exist?

I understand that there needs to be an incentive for the nodes to be keeping the blockchain up and running by validating blocks, and mining rewards is that incentive. I fail to understand why does ...
Madhavan Malolan's user avatar
2 votes
1 answer
3k views

Why higher gpu clock resulted in lower hash rate?

I have a couple of question, if you'd be so kind to answer: I've been searching the internet for the relation between GPU core clock & memory clock and the hash rate that it can do. All ...
violt's user avatar
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Statelessness vs statefulness - what is the difference? Comparison Bitcoin's vs. Ethereum's states

I now read multiple times about bitcoin, that it is a stateless system and that because of that bitcoin simple-purpose computations or programs can be executed at anytime and independent from any data....
Ndrslmpk's user avatar
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92 views

Can I use a Bitcoin client to sign a message with an Ethereum address?

If an Ethereum address is a point on the Bitcoin EC, then one can use the private key that matches that address to sign a message using bitcoin software. I'd like someone to prove they have the ...
Dave Scotese's user avatar
2 votes
0 answers
206 views

Are there any exchanges like Shapeshift for testing and development?

I'm developing a simple application which involves calling Shapeshift, Bitfinex and similar exchange APIs. They do not provide any sandboxed or under-testnet versions of their APIs for clients to use....
Hernán's user avatar
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Is using Ethereum to trade in betting markets legal in US?

Right now the betting market in US is regulated by CFTC and some sites like PredictIt have $850 limit per contract to be compliant with CFTC. I have seen some prediction markets like Augur that use ...
user13501's user avatar
1 vote
1 answer
20 views

Do Miners/validators get rewarded for miming/validating blocks on Testnets

We know in in Bitcoin ,the miners gets an economic incentive i.e rewards for mining and verifying the transaction to the mainnet. But in case of testnet, there is no real rewards the miners or ...
Code Blocker's user avatar
1 vote
1 answer
284 views

How to convert testnet BTC to WBTC?

How can I convert my test BTC to WBTC so that I can then communicate with EVM Ethereum?? Should I use a particular DEX over others or are there methods that already exist in the bitcoin libraries out ...
AlexCav's user avatar
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Will the Legacy address on Ledger hardware wallets always be supported?

Ledger hardware wallets apparently have 2 different HD path types: Legacy and Ledger Live. Will the Legacy wallet addresses still be accessible and operational in new device models like the Ledger ...
user610620's user avatar
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Using Electrum, a Bitcoin wallet, generated ZPUB extended public key for Ethereum purposes?

I would like to set up a watch-only wallet, in which I could have Ethereum coins along with my Bitcoins. I have already generated an extended public key of type ZPUB using Bitcoin-only Electrum wallet....
yssup's user avatar
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generate valid address for polkadot and bitcoin and other tokens using web3.js

using below code const Web3 = require('web3'); const apikey = "b1fdacbb-59ea-4598-96ed-......"; const network = 'testnet'; // Change to mainnet for production const chainId = 97;...
Amaryllis Lavender's user avatar
1 vote
0 answers
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Transactions that led to the discovery of TheDAO hacker

What are the transactions that led to the discovery of the apparent hacker of TheDAO? What are the primary transactions across the Ethereum, Bitcoin, and Grin blockchains?
eth's user avatar
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Why do small introduction Ethereum miners not exist, similar to Bitcoins Block Erupters?

I was introduced to Bitcoin and crypto with Block Eruptors which were little miners which would not realistically earn you anything but were a big hit, is there a technical reason Etherum miners only ...
Josh Hales's user avatar
1 vote
0 answers
119 views

is it possible to sign bitcoin transaction on Ethereum smart contract?

I want to create cross chain transaction without centralise backend. if anyone transfer WBTC to smart contract with native bitcoin address, smart contract sign native BTC transaction and sent to ...
hashgoal's user avatar
1 vote
0 answers
302 views

Blockchain. Using sub-wallets through the main wallet without any restrictions or commissions

What I mean: Alleged example: I have a wallet "A". This is the main wallet. I want to creat 5 sub-wallets (in real case it will be more than 10.000 sub-wallets) from the main wallet - "...
Vadim's user avatar
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How can I transfer ERC20 Tokens to Bitcoin donor in ICO?

I developed ICO on solidity. As everyone knows smart contracts only accept ETH, but I've seen many ICOs which accept BTC and any other cryptocurrency as well. I want to know how can I handle it if ...
Dhaval Parmar's user avatar
1 vote
1 answer
233 views

How to validate a BTC transaction in an Ethereum smart contract?

Can an Ethereum smart contract use SPV to validate a BTC or BCH transaction? If so, are there any functioning libraries? What are the drawbacks or challenges when doing so?
Jesbus's user avatar
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Deriving a Bitcoin Address from Ethereum Private Key

There have been many answers about how to derive an Ethereum Address from a Bitcoin private key, but a curious problem has led me to ask how one would do the reverse. I'm sure it's possible because ...
VoR0220's user avatar
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Where is the stake amount stored in Proof-of-Stake?

So in the PoS consensus algorithm, the nodes can lock their coins and the node with the highest coins has the highest probability of getting the chance for validating coins. I have two questions: 1) ...
Devanshu Linux's user avatar
1 vote
0 answers
35 views

Why does proof of work targeted zeros always comes at the start of hash? why is it not in the middle or the end of hash?

My question is why always targeted zeros come at the start of hash of the block? I have never seen more than 2 zeros in middle or somewhere else in the hash of mined block... What's the reason?.... ...
zohaib's user avatar
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How feasible it to combine Proof of Work and Proof of Elapsed time consensus to create a custom blockchain?

I wonder if it feasible to create your own custom consensus by combining Proof of Work and Proof of Elapsed time? How would I approach it? Any tools or frameworks to build it? I appreciate all the ...
monkrus's user avatar
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How to fix gas limit issue when doing official Ethereum Tutorial?

I'm trying to work on this tutorial for past three hours and I just don't understand why are there so many holes to do it. https://ethereum.org/greeter It took me forever to figure out what it ...
user280930's user avatar
1 vote
1 answer
78 views

Where, or how, can I programmatically get a complete history of the major cryptocurrencies?

I would like to programmatically get a complete list of the historical: Number of transactions Average Transaction Fee Hashrate Mining Profitability Difficulty Block Time Block Size related to the ...
user39184's user avatar
1 vote
0 answers
34 views

Calculating data amount being mined. Server

Does anyone know how to calculate hardware being used by mining activity on a blockchain? I'm curious what the equivalent hardware usage is in a blockchain. I'm looking for a formula of blockchain ...
D Rack's user avatar
  • 11
1 vote
1 answer
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Several basic question about difference Bitcoin and Ether transactions

Sorry for the easy questions. I was developing tools for Bitcoin and now I want to try and use Ethereum instead. Raw transaction does not contain inputs and outputs, enough balance confirm outside ...
Ilya Egorov's user avatar
1 vote
0 answers
69 views

How does BtcRelay ensure the transaction was signed by the claimer?

I noticed in the btcrelay docs that it asks for the tx index, raw transaction, merkle sibling and blockhash. It does not ask for the user to prove ownership of the key that created the transaction via ...
James's user avatar
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0 answers
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What specific technical advantages, if any, for any use-case, does bitcoin have over ether

Please note: I have reviewed What advantages and disadvantages does Ethereum have over Bitcoin? and What (if anything) in Bitcoin is better than Ether in the application area of a payment system? ...
Justin Maxwell's user avatar
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0 answers
15 views

How to build my own blockchain

I have been doing some theoretical reading on blockchain security for a while. To improve myself in this field, I want to develop a small-scale laboratory environment with my own computer and an old ...
yukara's user avatar
  • 3
0 votes
1 answer
19 views

what to do with a negative or r>curve.n/2 "r" in ecdsa signature

Hey guys it's your fellow beginner developer here again. Enough with chit chat! Last time I asked you guys about signature and how to generate recoveryID for v of the signature and learnt new stuff. ...
NIMA Shahahmadian's user avatar
0 votes
1 answer
37 views

Can ZCash be implemented as ERC-20 token or does it require another standard?

Obviously, you can implement e.g. Bitcoin as an ERC-20 token, but ZCash seems to have a way more complicated interface. I wonder if there is a standard describing tokens dealing with anonymity.
kuco 23's user avatar
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1 answer
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Explanation of a sample transaction details is needed

I am to the blockchain space. I was reading the Ethereum whitepaper, and I couldn't understand this example: Suppose Alice wants to send 11.7 BTC to Bob. First, Alice will look for a set of ...
Haydar Al-Rikabi's user avatar
0 votes
1 answer
23 views

What are the cross-chain names for the lowest and principal coin denominations?

For example: In Ethereum WEI is the lowest denominator, ETH is the principal one. In Bitcoin SAT is the lowest denominator, BTC is the principal one. What would be the chain-independant technical ...
Voy's user avatar
  • 123
0 votes
1 answer
42 views

How can I make a game that allows players to earn a certain NFT or crypto currency after they beat a boss?

I am an aspiring game developer and my friends and I have recently decided to make a game that centers around a main storyline and characters that can be defeated for crypto or NFT's. Could you give a ...
YadaYadaYada乌乌's user avatar
0 votes
1 answer
30 views

How does a miner know when to start mining. Given the miners are geographically dispersed, how all of them start mining together?

When the transactions are sent from A to B, it can reach a miner (M1) first and other miner (m2) later then does (M1) starts mining instantly? And how many transactions are required for a miner to ...
Vikram Pandey's user avatar
0 votes
1 answer
76 views

What is 'value blindness' in the ethereum whitepaper?

Vitalik wrote the following in the Ethereum white paper. Value-blindness - there is no way for a UTXO script to provide fine-grained control over the amount that can be withdrawn. For example, one ...
Slowblogger's user avatar
0 votes
0 answers
63 views

exchange gather all hd wallet adresses fund

every exchange has a HD wallet that stores the fund an assets of their clients but sometimes in order to keep peoples coins safe the exchanges have to move their assets to more secure wallet like ...
pardis.ti's user avatar
0 votes
0 answers
70 views

Unable to withdraw/send ETH from shapeshift app. Need advise on what to do, it pops up the message "Invalid BigNumber String Argument"

Having trouble sending out et here um from my shapeshift mobile app. Its over two weeks now but I'm still not able to send or withdraw my ethereum.
Curly's user avatar
  • 1
0 votes
0 answers
87 views

What's the difference between Binance ERC20 and Coinbase ERC20 ...?

As a newbie I made a mistake whilst transferring btc to from Binance and Coinbase. My mistake was I didn't check the receive address with Coinbase and it defaults to eth and I wanted to send btc to ...
Arif Malik's user avatar
0 votes
0 answers
94 views

Is there a project that can swap ETH and BTC using atomic swaps without having to deal with wrapped tokens like WBTC?

Is there a project that lets one do an atomic swap from ETH to Bitcoin or Litecoin or Monero without having to deal with wrapped tokens like WBTC(wrapped btc)? Basically a cross chain swap, without ...
Patoshi パトシ's user avatar
0 votes
1 answer
210 views

Like an ERC20 interface, do we have any interface or a smart contract that supports creating and transferring Ether on Ethereum?

To create a token on Ethereum, we use ERC20 token interface to design our token smart contract that captures functions required like mint(), tranfer(), balanceOf(), etc. Similarly, do we have any ...
Muni V K's user avatar
0 votes
2 answers
247 views

Transaction malleability

I read about transaction malleability and have some questions regarding that, please help: It states, for transaction malleability a person changes the signature such that the transaction remains ...
uzair kath's user avatar
0 votes
0 answers
48 views

PIVX fork CryptoDezire Coin SendRawTransaction not working

A CDZC coin basically fork of PIVX . I am trying to send coin via rpc calls. Successfuly created RawTxn, SignRawTxn but unable to SendRawTxn. `await rpc.listunspent().then(async r => { ...
Syed Aqeel Hassan Kazmi's user avatar
0 votes
0 answers
49 views

How can I use bitcoin block stamp as seed for random number generation?

I am trying to create an ethereum based smart contract that shall generate random number. After searching around, I get to know that ethereum block stamp is vulnerable to miners hacks and false ...
Fariha Abbasi's user avatar
0 votes
0 answers
23 views

Is it legal create an algorithmic trading cryptocurrency fund for social groups around the globe to pool in their money?

Is it legal create an algorithmic trading cryptocurrency fund for social groups around the globe to pool in their money? What is the viability of this project in terms of regulatory compliance?
AshT's user avatar
  • 103
0 votes
0 answers
92 views

Ethereum hd wallets making transactions like bitcoin wallets

I'm working on an exchange where every user has given a unique address, generated via ethereum hd wallets. How can i use a single master private key to transfer available funds from different ...
user3834897's user avatar
0 votes
3 answers
121 views

Blochchain Smart Contract App

Actually Im working on a blockchain application based on smart contracts that allows to buy/sell properties and paying in cryptocurrency using Ethereum and Bitcoin. I wonder I develop smart contract ...
Amara's user avatar
  • 1