Questions tagged [bitcoin]
bitcoin is a digital asset and a payment system invented by satoshi nakamoto.
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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.
...
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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 ...
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How are cryptocurrencies transferred between different networks?
I am new to blockchain and I have read some articles about coins, smart contract, tokens, etc. What I don't understand is that how I can send coin cross different networks. For example, I have a ...
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How to recover funds from ETH address generated using Bitcoin xpub?
By accident I generated ETH address using Bitcoin xpub. Is there any way to recover funds from that ETH address?
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How to generate Bitcoin Address from Seed Phrase?
I know I can use ethers.js to generate my ERC20 compatible wallet address(public key) from my twelve words seed phrase. I have been wondering if that is doable with bitcoin addresses too because ...
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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 ...
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Integrating non-EVM blockchains into an Ethereum Wallet like Metamask via custom RPC nodes
I'm trying to create a RPC bridge middle-ware for non-EVM compatible blockchains like Bitcoin and other L1's. I want to keep it very basic first and be able to pass in just an account balance via the ...
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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 ...
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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.
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Are privacy zk-roll ups the Ethereum-equivalent of Bitcoin Tumblers?
In Bitcoin, people can move bitcoin privately using Tumblers or Mixers to obfuscate source of funds, like Tornado Cash.
In Ethereum, is the equivalent of this seems to be Privacy ZK roll-ups like ...
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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 ...
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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 ...
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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....
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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 ...
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generation of my private key
Can my private key be generated when someone else creates a wallet?
If each private key is generated completely randomly, then I think my key can be generated repeatedly
I created a wallet, but on ...
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Transfer Bitcoin and other tokens through a Binance Smart Chain
How would one transfer tokens such as Bitcoin through a finance smart chain (so from Binance) to a hardware wallet like Trezor, in order to avoid higher fees? Also, which the third party could be used?...
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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 ...
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What does 'blockchain blindness' in the ethereum whitepaper mean?
This is from the ethereum whitepaper.
Blockchain-blindness - UTXO are blind to blockchain data such as the
nonce and previous hash. This severely limits applications in
gambling, and several other ...
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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 ...
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Why we can't build decentralized applications upon Bitcoin?
I have recently gotten into blockchain development and reading from different sources, watching videos I've incurred that we have been building major De-Fi projects, applications upon Ethereum, EVMs ...
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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;...
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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♦
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Bitcoin address to private key, [closed]
I know its impossible to calculate a Bitcoin private key from address, but how far beck can you go with math, where math stops?
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Is MEV possible on bitcoin?
Miner Extractable Value (MEV) is a big topic in the life of ethereum users, and it creates an additional revenue source for the miners.
Is MEV possible on the bitcoin blockchain as well? And if yes/no,...
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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 ...
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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 ...
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When we say that a 51% control of total computation power could lead to a successful Sybil attack, do we refer to miners or nodes?
As per my understanding of the blockchain so far (Bitcoin and Ethereum) nodes and miners have different jobs to do in a blockchain network. Although the terms are extensively used interchangeably, ...
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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.
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What is the core difference between coin and token?
From googling some results, both are exchanges of value
token is limited to the project ecosystem.
coin is a general-purpose exchange of value.
But I didn't get it Bitcoin is a Coin still we buy it ...
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A Complete Guide to Cryptocurrency Exchanges for Beginners? [closed]
So you have heard about cryptocurrencies, especially after the unbelievable market growth it caused worldwide in the last few years and was in news all the time. Whatever the coin may be, the first ...
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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 ...
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Why can we trade tokens from foreign blockchains on DEX?
I am trying to understand the concept of crypto exchanges (AMM / DEX).
On a DEX on Ethereum, how is it possible to trade tokens that are not native to Ethereum, such as Bitcoin? How does the DEX ...
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My ToastWallet account is hacked. What to do please? [closed]
My toast wallet was hacked. I had forgotten my passphrase. I need help desperately. I forgot my passphrase and noticed a few days ago over 25K xrp has been withdrawn in 5 transactions past, ...
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Why does Bitcoin need to change receiving address for privacy, but not Ethereum? [duplicate]
Exactly as it says in the title. Why is it that, for the sake of privacy, wallets change your Bitcoin receiving address for every transaction, but not for Ethereum. Do they just not care about ...
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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 - "...
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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 ...
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Stack too deep, try removing local variables. _tOwned[sender] = _tOwned[sender].sub(tAmount); [duplicate]
I need help, i don't understand this Error...
Code:
function _transferFromExcluded(address sender, address recipient, uint256 tAmount, bool lottery, bool updateWinner) private {
uint256 ...
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Is there a blockchain reddit alternative?
Is there a blockchain Reddit alternative? I know of Reddit alternatives like communities.win but it's not blockchain and one cannot create a new community on one's own.
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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 ...
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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 ...
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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....
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Why ETH has value and what is the floor for it?
I've been happily on my journey down the crypto rabbit hole over the last few months of quarantine. I've personally bought into the narrative that Bitcoin excels as a digital store of value, and as ...
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Can i sell my testnet tokens
I have some testnet tokens Eth,btc,litecoin,I need to know how can I sell this can we swap this to mainnet any site to do this
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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 ...
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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?
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Using Chainlink External Adapters doesn't return anything
Trying to use this Bitcoin Adapter
But having some issues specifically with the copyPath argument and the callback arguments.
For one, I would like to retrieve multiple parts of the JSON that is ...
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Are the yields on Compound legit?
I have been reading recently about the DeFi space. I have noticed (admittedly, pretty late) quite a bit of buzz regarding WBTC and its applications in Ethereum. I have read about the Compound dapp and ...
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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 ...
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Ethereum vs bitcoin technology [closed]
I have understood how bitcoin works (coinbase block, mining, links between transactions, hashrate, nounce, proof of work, ...)
Now i want to understand how Ethereum works.
Can we say it is the same ...
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What if difficulty exceeds the length of a fixed sha256 hash in proof of work?
Hello im a newbie in Blockchain, i got to know some basics, but im confused that what if the difficulty exceeds the length of a sha256 fixed length string
example :
The fixed length is here 64 (sha256)...
