Join us in building a kind, collaborative learning community via our updated Code of Conduct.

Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts. Join them; it only takes a minute:

Sign up

Here's how it works:

Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top

Top Questions

active 1 featured hot week month

6

votes

2

answers

704

views

How is Bitcoin governed by mathematics?

bitcoin-core consensus governance math

modified Aug 13 at 15:00 JBaczuk 1,354

4

votes

1

answer

477

views

How can forks coexist even though only one of the is the longest chain?

altcoin bitcoin-cash blockchain-fork

modified Aug 2 at 17:03 Murch♦ 33.4k

3

votes

1

answer

947

views

Could Bitcoin be based on accounts instead, more like banks?

algorithms

answered Jul 30 at 5:14 Raghav Sood 4,869

3

votes

1

answer

751

views

How does timejacking enable double spending?

bitcoin-core security timestamp

modified Aug 6 at 12:18 Raghav Sood 4,869

4

votes

2

answers

57

views

what's the point of “n” in “vout”? getrawtransaction

raw-transaction output

modified Aug 1 at 1:40 Andrew Chow♦ 26.5k

5

votes

1

answer

379

views

How can all possible numbers in 256-bit space be squeezed into 160-bit space?

wallet address security private-key

modified Jul 30 at 19:59 skaht 2,022

4

votes

1

answer

186

views

Why aren't block hashes used directly as scores for difficulty purposes?

blockchain mining-theory difficulty

modified Jul 21 at 1:05 chytrik 4,673

1

vote

1

answer

338

views

How is PSZ Timestamp encoded in Bitcoin core code?

bitcoin-core genesis-block timestamp

answered Jul 23 at 11:48 Raghav Sood 4,869

1

vote

1

answer

227

views

Bitcoin cli asks to use estimatesmartfee with new syntax that is not described in docs

transaction-fees fee-estimation

answered Jul 22 at 22:22 Raghav Sood 4,869

1

vote

3

answers

162

views

bitcoin testnet is mining about 50 blocks per minute right now - why? [closed]

bitcoin-core bitcoind testnet

modified Aug 4 at 3:03 JBaczuk 1,354

4

votes

1

answer

210

views

From where does the 2 hours limitation on bitcoin time stamp come?

bitcoin-core blockchain timestamp whitepaper

answered Jul 30 at 22:24 Raghav Sood 4,869

3

votes

2

answers

121

views

Who was the person that told Satoshi “You will not find a solution to political problems in cryptography”?

satoshi

modified Jul 30 at 0:05 Fuzzybear 451

3

votes

2

answers

56

views

Does a Block contain the list of transactions? Or only the Merkle Tree?

transactions mining-theory merkle-tree theory blocks

modified Jul 23 at 19:58 G. Maxwell 849

1

vote

3

answers

57

views

What prevents DoS based on near-valid block timestamps?

attack timestamp

answered Jul 24 at 23:42 G. Maxwell 849

2

votes

3

answers

92

views

How do I know that a node provides the accurate blockchain

blockchain nodes block-validity

modified Jul 27 at 18:22 Fuzzybear 451

1

vote

1

answer

96

views

what if a coin is spendable by multiple keys?

script

answered Aug 5 at 3:05 MeshCollider♦ 7,751

0

votes

3

answers

41

views

Reject or refuse to relay a valid transaction

transactions bitcoin-core transaction-verification validation

modified Aug 10 at 18:59 Zelgada 21

3

votes

2

answers

49

views

Shortest and Longest block interval time ever recorded in Bitcoin

block confirmations block-interval confirmation-time-estimation

answered Aug 5 at 23:21 Nate Eldredge 19k

0

votes

2

answers

48

views

Can I use Copay wallet from Iran? [closed]

wallet copay

modified Jul 22 at 15:14 RedGrittyBrick 1,256

0

votes

1

answer

37

views

Raw transactions - SubtractFeeFromAmount flag

transactions transaction-fees raw-transaction sendtoaddress

modified Jul 25 at 14:37 Fuzzybear 451

1

vote

2

answers

37

views

What are the hashes in Unspent outputs?

hash raw-data output endianness

modified Aug 7 at 9:23 Fuzzybear 451

3

votes

1

answer

60

views

When are Bitcoin transaction outputs generated more than two?

bitcoin-core blockchain

answered Aug 5 at 11:51 Raghav Sood 4,869

2

votes

3

answers

44

views

Do more miners imply less reward?

mining-profitability

answered Aug 2 at 22:30 Nicolas Lopez 336

0

votes

2

answers

55

views

If anyone with your seed phrase can generate your wallet private keys, what is the advantage of a hardware wallet?

private-key seed hardware-wallet recover-private-key

answered Aug 1 at 14:46 Nicolas Lopez 336

1

vote

1

answer

66

views

What does this comment in Chainparams.cpp mean?

bitcoin-core bitcoind hash coinbase-transaction

answered Jul 23 at 10:30 Raghav Sood 4,869

1

vote

1

answer

51

views

Understanding how validation of a transaction works

blockchain

answered Aug 5 at 13:59 Raghav Sood 4,869

0

votes

3

answers

23

views

What they stored in cold wallet? All bitcoins anyone owned is already in blockchain

bitcoin-core coldstorage

answered yesterday Nate Eldredge 19k

0

votes

1

answer

47

views

How to unlock private key of bitcoin

bitcoin-cash

modified Jul 30 at 14:55 RedGrittyBrick 1,256

2

votes

1

answer

47

views

Difference between wallet,accounts and addresses

bitcoin-core blockchain bitcoind

modified Aug 14 at 17:37 Allen Kessi 1

0

votes

1

answer

91

views

+50

Can I prove a double spend attempt with a signed tx with same input?

scriptsig p2pkh atomic-swap

modified Aug 15 at 0:15 jaybny 68

1

vote

2

answers

33

views

Why doesn't bitcoin have a dns server?

dns

answered Aug 12 at 11:34 David A. Harding 9,004

0

votes

2

answers

20

views

Determine which transaction output is a change address and which is not [closed]

change chainanalysis

modified Jul 24 at 5:26 Abhishek Sinha 126

1

vote

2

answers

52

views

Blockchain vs. Banks: which one has more affordable transaction fees?

blockchain transaction-fees banks

modified Aug 11 at 6:48 JBaczuk 1,354

0

votes

1

answer

64

views

Tether USDT raw transaction unsigned

transactions raw-transaction tether

modified Jul 22 at 3:51 Marcelo Rafael 105

-1

votes

1

answer

30

views

Funds disapprearance

blockchain mining-pools mining-profitability

modified Aug 5 at 3:39 GGMG 103

1

vote

1

answer

38

views

What is the correct use of the term “validating”?

transaction-verification terminology validation block-validity

modified Jul 20 at 16:12 Murch♦ 33.4k

2

votes

3

answers

37

views

When a node receives a transaction, what steps does it do to verify that transaction?

bitcoin-core hash nodes transaction-verification

modified Aug 5 at 7:47 dionyziz 694

2

votes

2

answers

36

views

Do legacy nodes receive the witness fields of a Segwit transactions?

segregated-witness

answered Aug 5 at 10:32 Ifo0 25

1

vote

3

answers

46

views

PoW 51% attack vs. BFT 1/3 attack?

proof-of-work consensus

modified Jul 27 at 1:21 G. Maxwell 849

1

vote

2

answers

45

views

Bitcoin core wallet - got 0 balance after transaction [closed]

transactions bitcoin-core change

modified Jul 25 at 14:38 Fuzzybear 451

1

vote

2

answers

35

views

Can one recover the full list of public keys generated in electrum with the seed/private key?

electrum public-key address-generation

modified Jul 28 at 13:48 skaht 2,022

0

votes

1

answer

43

views

Does Electrum provides any API?

bitcoin-core electrum bitcoin-cash bitcoincore-development hd-wallet

modified Jul 27 at 15:57 Adam 2,664

1

vote

1

answer

70

views

Can not decode transaction. Script was manually verified successfull

transactions raw-transaction

answered Jul 27 at 15:20 pebwindkraft 4,067

2

votes

2

answers

32

views

While calculating merkle proof, where are the other hashes being stored?

blockchain merkle-tree

modified Aug 1 at 17:38 dbkeys 470

1

vote

2

answers

40

views

Find all transactions for a bitcoin address

bitcoind

answered Aug 9 at 6:16 jaybny 68

0

votes

2

answers

31

views

I want to know how I can express a phenomenon found in Merkle Trees mathematically

hash merkle-tree algorithms

answered Jul 24 at 23:32 G. Maxwell 849

1

vote

1

answer

31

views

Share balance between lnd and bitcoind

bitcoind lightning-network lightning-network-daemon

answered Jul 28 at 19:56 chytrik 4,673

0

votes

2

answers

39

views

Sent to wrong bitcoin address [closed]

transactions

answered Aug 4 at 1:16 chytrik 4,673

Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.

Bitcoin Stack Exchange works best with JavaScript enabled