Community Digest

Top new questions this week:

Why is there "Change" in Bitcoins?

I have read about a change address and wondered why there even is the concept of change? Let's say I received 1 BTC from some person A and I want to send 0.4 BTC to another person B, afterwards. From ...

transactions utxo change  
asked by André Kuhlmann 13 votes
answered by Raghav Sood 19 votes

Why does vout sometimes not have address?

I am trying to parse all transactions. I found that some transactions do not have addresses in their vout. There are two situations that vout does not have addresses. The first one is the miner ...

output p2pk  
asked by Mars Lee 4 votes
answered by Raghav Sood 8 votes

Cheat Lightning network (c-lightning)

I want to understand how cheat lightning network using c-lightning. I understand that if a participant of che channel send not last commitment transaction, it means that he tries to cheat. I'd like to ...

lightning-network c-lightning ln-commitment-transaction  
asked by monkeyUser 4 votes
answered by cdecker 3 votes

How does the sender know the receiver's public keys in a m-of-n transaction?

Assume that Alice is controlling an address that requires multisig to spend bitcoins. Someone wants to send Alice bitcoins and this sender needs to create a scriptPubKey as part of the output paying ...

transactions script multi-signature  
asked by ddavi031 3 votes
answered by Murch 3 votes

Why is my bitcoin core not downloading any blocks?

I am using Centos 7 and I installed the newest version of bitcoin core. I just want to run a full node to download all the blocks. According to their documentation, the first time we start bitcoin ...

bitcoin-core bitcoind  
asked by Bella 2 votes
answered by Andrew Chow 2 votes

How do Bitcoin balances work when an address is controlled by multiple parties together?

user1, pubkey1, 1.1 BTC user2, pubkey2, 1.2 BTC user3, pubkey3, 1.3 BTC user4, pubkey4, 1.4 BTC user4 sends 0.4 BTC to a 2-of-3 multi-sig account controlled by user1, user2 and user3 using P2SH. The ...

multi-signature utxo balance  
asked by Cisco Mmu 2 votes
answered by Murch 2 votes

How to accelerate mempool data access with bitcoind

What could I do to accelerate access to the data I get when I call for example: bitcoin-cli getblocktemplate ? If I would like to be able to be the fisrt one who get information about all the new tx ...

bitcoind mempool  
asked by Strob 2 votes

Greatest hits from previous weeks:

Do these new ASIC miners really pay for themselves in 5 days?

The Bitforce 50GH/s miner costs $2,500 today, and according to the following calculation it would mine enough coins in about 5 days to pay for itself. I am sure I am missing something here. Why would ...

mining-profitability mining-hardware difficulty asic  
asked by Simon 32 votes
answered by user3418 25 votes

When will the last Bitcoin be mined?

Estimates have been thrown around a lot recently as to the year in which the last Bitcoin will be mined- where are these estimates coming from? Could someone send me to the relevant code?

asked by Jason Dreyzehner 25 votes
answered by Colin Dean 25 votes

Bitcoin sent, recipient claiming not received

I sent bitcoins to the address I was given (double checked). The recipient is claiming they did not receive it. I sent them a different payment yesterday at 8:30p and they didn't get it until 4:00am ...

wallet receiving  
asked by Cccc1234 19 votes
answered by Raghav Sood 29 votes

Where is the data folder for Bitcoin-Qt?

Where can I find the blockchain, wallet.dat, etc. on each of the operating systems Bitcoin-Qt supports?

bitcoin-core client user-data datadir  
asked by Chris Moore 40 votes
answered by ThePiachu 48 votes

How can I convert bitcoins to Indian rupees and vice-versa?

How can I convert bitcoins into Indian rupees (INR) and get them in paper rupee notes?

exchanges banks india  
asked by Vasuki 15 votes
answered by ThePiachu 6 votes

What is a 'Satoshi'?

I am aware that Satoshi Nakamoto is the author of the paper that originated Bitcoin and the creator of the original bitcoin client. However, I often hear the term Satoshi as if it was a monetary unit. ...

terminology satoshi-nakamoto satoshi divisibility  
asked by nmat 152 votes
answered by Michael McGowan 152 votes

How to safely shutdown bitcoind ?

Surprised this one hasn't been asked yet. But how / what is the recommended best practice for shutting down bitcoind ? Right now I'm manually killing the process with either sudo kill {pid} or if ...

asked by ManreeRist 32 votes
answered by Jori 15 votes

Can you answer these questions?

About polluting the peer table

Is there a well-known method to pollute a specific user's peer table? Eclipse attack is not available anymore due to the patch after a paper was introduced. Can you give some keywords? Thank you!

network p2p  
asked by Hyunsoo 1 vote

Explorer for blockchain

I want to develop an explorer for coins(BTC,LTC,BCH,...), like blockchair, or blockchain. I've searched a lot and I have found different answers. Finally, here is my solution. First, I use RPC to ...

bitcoin-core blockexplorer  
asked by Meysam Valueian 1 vote

Why does bitcoin uses INIT_PROTO_VERSION (209) for addrme and addryou in the Version Message

Why does Bitcoin use INIT_PROTO_VERSION (209) in the addrme and addryou message of the Version Message? Why is it not using the nodes protocolVersion which had been advertised in the same Message. ...

asked by Aviator 1 vote
answered by Andrew Chow 0 votes
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