Community Digest

Top new questions this week:

What is the difference between Dogecoin and Bitcoin at the network level?

With all the Dogecoin hype, mainstream media has been comparing Doge with established cryptos like Bitcoin. I'm trying to understand the difference at the technical level: It comes up that Bitcoin ...

altcoin-development dogecoin adoption  
asked by John Smith 10 votes
answered by Murch 17 votes

Isn't Bitcoin's hash target supposed to be a multiple of 2?

From Bitcoin's whitepaper I've gathered that the hash of a block must start with a certain number of zeroes. And that this number of zeroes is adjusted every 2 weeks. Consequently the hash target is a ...

difficulty difficulty-retargetting  
asked by Fred 4 votes
answered by Andrew Chow 13 votes

Is money that has gone into bitcoin already spent?

Is money that has gone into bitcoin already spent? When I buy a bitcoin from someone and they get USD I get bitcoin. They go buy lambos or real estate for their gains. So the underlying currency is ...

value  
asked by ram4nd 4 votes
answered by ghellquist 2 votes

Why isn't Replace by fee default for all transactions?

I know it's a wallet implementation and a flag, but when it was introduced why wasn't this change a rule for all transactions so that anyone could RBF if they wanted to instead having had to set the ...

replace-by-fee  
asked by zndtoshi 4 votes
answered by Murch 2 votes

Does Bitcoin Core support BIP157? (some call it neutrino)

I want to allow my bitcoind node to support BIP157 so that i can allow some friends to connect their LND nodes to it. Does it support it by default? Or do i need to explicitly enable it?

lightning-network compact-client-side-block-filters  
asked by Albert s 3 votes
answered by Andrew Chow 6 votes

% of full nodes running Bitcoin Core versus other node software

Is anybody able to tell me a credible source (for an article) that can show me the percentage of all bitcoin full nodes that are running Bitcoin Core (as opposed to other software)? I could not find ...

full-node  
asked by Midori 2 votes
answered by leevancleef 0 votes

UTXO Selection: How does a wallet decide which utxo to use?

I am using a cold wallet and made a few tx two days ago. However, though what I wanted to send was a very small amount of btc, the wallet made multiple utxo of huge amounts get involved and now all my ...

wallet utxo validation algorithms  
asked by Rich 1 vote

Greatest hits from previous weeks:

Where can I see my Bitcoin address?

I use the original client, but I don't know where can I find my Bitcoin address. Can someone help me?

bitcoin-core address  
asked by Rowt 5 votes
answered by ThePiachu 4 votes

How do I send Bitcoin in paper wallet to other person?

I'm new to bitcoin. Can you tell me step by step how do I send Bitcoin in paper wallet to other person. Thank you!

transactions  
asked by user9777 20 votes
answered by Abdussamad 23 votes

Is it possible to brute force bitcoin address creation in order to steal money?

Bitcoin users frequently generate new addresses for each transaction they make, which greatly increases the number of bitcoin addresses being used to receive money. Would it be possible (and ...

security address weaknesses key-collision  
asked by nmat 128 votes
answered by David Perry 67 votes

How to calculate transaction size before sending (Legacy Non-Segwit - P2PKH/P2SH)

I know that I pay the transaction fee per kB, so how can I calculate how large the transaction will be before I send it via the RPC api. I run a site using bitcoins, and I cannot let the user's ...

transaction-fees p2sh p2pkh transaction-size  
asked by macintosh264 60 votes
answered by Chris Moore 63 votes

What is a mBTC?

I have been trying to find out just what is an mBTC is. Everywhere I look I cannot find out what the value is compared to a Bitcoin. I was hoping you could advise me of what the value is.

terminology divisibility  
asked by jock courtney 7 votes
answered by Murch 15 votes

What are "bitcoin days destroyed"?

The concept of bitcoin days destroyed has been proposed as a measure of bitcoin volume. However, I don't think the bitcoin wiki really explains the idea very well. What is the purpose or advantage of ...

economic-theory terminology bitcoin-days-destroyed  
asked by z7sg Ѫ 175 votes
answered by eMansipater 185 votes

What happens if I buy Bitcoins and the price goes down?

What happens if I buy Bitcoins and the price goes down. Will I lose a quantity of my money? Consider:

trading value  
asked by Philip Kour 16 votes
answered by Hannah Vernon 58 votes

Can you answer these questions?

Educational sample of minimal working mining code

I would like if someone could point me to a minimal program source code that does solo minig on a CPU. (Can assume a running bitcoind/full node) Something that in theory (obviously not in practice) ...

mining-theory source-code education  
asked by user1747134 1 vote
answered by leevancleef 0 votes

P2SH address as a product of public keys

Assuming the multisig 2 of 3, if I do have extended public keys (xpub) for all 3 cosigners (with proper derivations), can I somewhat get the result address (P2SH)? How to calculate the "script&...

multi-signature python p2sh xpub  
asked by Tony Sanak 1 vote

How do nodes handle long reorgs?

In a reorg where a node receives blocks for a longer or equal-length chain than the chain they previously followed as longest, what is the process for that node to handle this situation? I can imagine ...

chain-reorganization  
asked by B T 1 vote
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