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10 views

Address Reuse for Multisig Address

It is De facto standard that address should not be reused, and even Bitcoin officially emphasis address should not be reused. Does the same condition apply for Multi-signature address ?, If Yes apart ...
1
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1answer
22 views

Where does “Included in Block” value comes from?

I was exploring transactions inside of a blockchain using this site, and inside of a transaction I noticed there is attribute called Included in Block and its description is: block this transaction ...
-1
votes
1answer
31 views

Details of SPV clients

I explored SPV client as a subject from a lot of different resources, but there is a couple of things that are keeping me confused: I found out that SPV has no mempool, but although SPV client is ...
0
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0answers
12 views

What is the mining pool's transaction choosing algorithm to maximize their reward?

I have read the Bitcoin Core(version 0.19)'s source code, I have read its transaction choosing algorighm, I found that algorithm can not maximize the minging reward,I think the mining pool has its own ...
1
vote
1answer
18 views

What is the meaning of 'change' and 'reserve' in a Bitcoin Core wallet dump?

I'm using libwally to derive addresses from an extended private key. I shared the seed with Bitcoin Core (loaded it in a blank wallet with sethdseed), and noticed that there are 2 addresses in the ...
0
votes
1answer
13 views

Upgrade apt bitcoin-core package

I originally set up my bitcoin-core node on Ubuntu 16.04 Xenial using apt. The ppa:/bitcoin/bitcoin package repository that I used isn't maintained beyond version 0.15.0, so I need a different way to ...
1
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0answers
15 views

Validation for a seed collision

Came across this post while researching, and it claims: This mnemonic: weary weapon unseen like like like like like like like like like and this one: sister glide dude near muse sent like like like ...
0
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2answers
15 views

Transaction in future

Is there any plan to add a feature so that you can perform transactions that will be spent in the future and stored on the network? For example, I want to send some bitcoin to my kids after each N ...
1
vote
1answer
18 views

Manual work as source of entropy

Working on an opensource air-gapped crypto vault, in which I have the regular method of relying on OS to provide cryptographically secure random source and use that to generate the mnemonic phrase. ...
0
votes
1answer
12 views

Installation instrucion the for bitcoin core (tar.gz file from bitcoin.org in Linux/Ubuntu Desktop 18.04.)

There are many discussions going on as there is a lack of a simple tutorial as to how to install Bitcoin Core (GUI) on Linux distributions, i.e Ubuntu 18.04. Bitcoin.org offers the tar.gz file (i.e. ...
1
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1answer
15 views

Address generator error with python

I had created a script that creates a bitcoin private key, public key and address, for checking if all works fine I create one and check the private key on https://walletgenerator.net/, and it outputs ...
1
vote
1answer
28 views

What valid transactions are not broadcastable?

Many valid transactions are not broadcastable by default in bitcoin core to avoid attacks that could harm the network. These would rarely be found in a node's mempool but could, however, be found in ...
1
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0answers
16 views

UTXO snapshots and history pruning

Is there a research, BIP proposal or simple discussion about possible improvement on the size required to run a full node and a way to shrink/prune the history of bitcoin and have fast sync? Let me ...
-1
votes
1answer
33 views

i find r s z from tow transaction but the r value is not same

i need your help plase i find r s z from tow transaction but the r value is not same from this wallet 1XCPdWb6kk7PGfvbdRbRuNh51aPc4vqC7 this is information tx 1 ...
0
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0answers
39 views

How to pass createrawtransaction with json-rpc to bitcoin-qt [closed]

I'm trying to post to a local bitcoin full node via json-rpc but I'm getting error 500 from the server. Following the documentation here I tried this code but it's giving the error 500, it works fine ...
0
votes
0answers
14 views

How are transations validated? [duplicate]

As per my understanding whenever someone sends a bitcoin it gets added to the transaction pool. The miner then take these transactions from the pool and add it to the block. However, I wanted ...
0
votes
0answers
9 views

How to know if I have profit based on bid and ask

So i'm really new into this crypto thing so my question is , supposing that i have bought 1 BTC at some market price, I wanna how it is known if should i buy or sell my assets based only on the ...
0
votes
1answer
17 views

Coinbase (or other service) conversion to fiat: how is that recorded in the Blockchain?

This is probably already answered, but I searched and couldn't find a similar question or answer. If I use a service such as Coinbase to buy Bitcoin, Coinbase generates a BC address for me and that's ...
0
votes
1answer
25 views

GetBlockChecked always returning genesis block?

currently I'm exploring Bitcoin source code and I tried to add custom function getblockvalue inside of blockchain.cpp. Purpose of function is to return sum of all transaction outputs inside of a ...
1
vote
1answer
18 views

Is history reversal a concern if the absence of attackers is assumed?

As described in the Bitcoin paper, the Bitcoin network may temporarily diverge, or "fork," as nodes may work on different blockchains. The network reconverges, however, as a node will always ...
3
votes
1answer
34 views

What are the different upgradeability features in the BIP-Taproot (BIP 341) proposal?

What are the different upgradability features in the BIP-Taproot (BIP 341) proposal? Why are there so many upgradability paths? Is there something an annex can do that a leaf version can't? This ...
0
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0answers
22 views

Lost investment to bitcoinds [closed]

I invested over £3000 in Bitcoins, but deal has vanished, no funds in my wallet. lost all my investment. I paid by debit card, can I get the money back?
1
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2answers
20 views

Is it safe to store mnemonic seed in the email if I change random 2 words?

If I store 12 word seed in the email like gmail and my phone as well but change 3rd and 7th words in the seed for example with other bip-39 words and remember it, would that be safe? I can't think of ...
0
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0answers
38 views

how i can find private key from Y X Z [duplicate]

How can I find the private key with X and Y and Z in the transaction i have this ('THE R VALUE is :', '0cf435db180216f3aaa5c2cb8231cbccf2f6824fc0051396b45e4ab01bb0f5e3') ('THE S VALUE is :', '...
1
vote
1answer
33 views

How small can a payment be while still adding value to your wallet?

If you receive 1 satoshi (0.00000001 bitcoin) in a transaction then adding it as an input to a larger transaction would add more than 1 satoshi to the transaction fee. This means the 1 satoshi shows ...
0
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0answers
28 views

How may i get all transaction from A address to B address & opposite? [duplicate]

So i just finish download the blockchain from Bitcoin Core, how may i load them files, filter all the transaction from an address to another & print it to text file with detail?
0
votes
1answer
20 views

Is there a CUDA binary to convert a brainwallet string to a BTC address?

I am looking for a CUDA program which will take a single argument, a brainwallet password, and output a BTC address. After reading through several threads on how to convert passwords to public keys, ...
0
votes
1answer
28 views

Schnorr without R in the challenge

I read the Schnorr and MuSig papers and stumbled over the problem that the use of deterministic nonces in multisignatures is not safe. The adversary would be able to extract the private key from the ...
-1
votes
1answer
40 views

How does bitcoin core establish a peer to peer network

I've tried to look for an answer to this online and haven't found any. My question is: how does bitcoin establish a peer to peer network. Establishing a centralized network with a server in the middle ...
1
vote
2answers
106 views

Do you sign only the previous output of transaction?

I need to confirm that I understand how transactions work in the Bitcoin network. Ok, so: Alice is a network node. Alice wants to send bitcoins to someone in the network. Alice is creating a ...
1
vote
1answer
22 views

Working with Bitcoin node on Windows as a developer?

I'm a web developer looking to integrate a Bitcoin node into a PHP application and I am unsure how I would go about interacting with the Bitcoin core in a developer environment for my machine. My goal ...
0
votes
0answers
19 views

Looking for a Trading Simulator [closed]

I'm completely new to Bitcoin and I am interested in learning how to trade. I wondered if there was a good trading simulator that I could find online? Any other resources are welcome of course.
1
vote
1answer
27 views

Multi-signature with no address reuse . How coordination is done?

I would like to have both 2-of-3 multi-signature and no address reuse. For example, 3 BTC belong to multi-sig user1 (Officer),user2 (Manager), user3 (CEO) (2of3 multisig) with pubkey1,pubkey2,pubkey3. ...
3
votes
2answers
34 views

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 ...
0
votes
0answers
27 views

Who has got Testnet Bitcoin to test my dApp? [closed]

I am in need of testnet Bitcoin in order to test and find any bugs in my dApp. It will allow people to swich automaticly from the btc chain to the ethereum chain (crosschain dApp). Here is my ...
0
votes
0answers
11 views

Is there a way to fetch all transactions in a block via electrum protocol?

Quickly surfing through the list of electrum methods, looks like not, and I will have to use getblock from bitcoind json-rpc. Is there a better way?
0
votes
0answers
14 views

Electrum & BitAddress Wallets Creation

Can anyone please tell me if my procedure is correct and enough. I've always heard and read that I must disconnect from the internet when creating Electrum Wallets, to keep away from hacks, viruses, ...
0
votes
1answer
22 views

Transfer BTC from paper wallet without 3rd party (like blockchain.com etc)

I have btc on my paper wallet and I want to transfer to some other address. How can I do this without sharing my private key to some other site like blockchain.com or electrum?
0
votes
1answer
29 views

Wallet balance reset

Maybe my question will be stupid, but still I hope for help. Launched a wallet. Synchronized with the network, and my balance dropped to 0. According to the history, it was written that the last ...
0
votes
0answers
18 views

How to customize a bitcoin rpc to show only some information (filtering out the rest)?

I would like to modify a bitcoin RPC, for example getblocktemplate to show only a single information, in this case: "mintime": 1594178622 I tried to go into bitcoin/src/rpc/mining.cpp and I ...
0
votes
0answers
11 views

Is hotbitmarket.com an online spam website [closed]

I purchased a service from hotbitmarket.com and they said I will get the scripts after I make the payment. Once the payment is completed, they stopped all communication and there is no scripts ...
1
vote
1answer
14 views

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. ...
-3
votes
1answer
36 views

MISSING FUNDS ON BLOCKCHAIN

Please help me out. i have never shared my wallet ID or password with anyone. i only loss access to my blockchain account because i misplaced my phone and i had to reset my 2FA. It has been approved ...
1
vote
0answers
14 views

How to reference different wallets with curl JSONRPC requests Bitcoin core

I have a headless Bitcoin core 0.17.1 running on Debian 10, and have created a second wallet "johns-wallet". I'd like to get the walletinfo (or any wallet request) of that specific wallet ...
4
votes
1answer
52 views

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 ...
0
votes
1answer
15 views

Simulate HTLC in regtest c-lightning

I have three nodes in regtest environment l1, l2, and l3 l1 create a channel with l2 l2 create a channel with l3 l3 create an invoice for l1. l1 can pays it because use the route l1-l2-l3 I presume ...
2
votes
2answers
36 views

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 ...
0
votes
0answers
16 views

How to create a Fast POS Coin [closed]

Hello how can I create or run a POS(proof of stake ) coin in my Linux mint does anyone has idea how to run it ?.
0
votes
0answers
17 views

How to get the bitcoin coinbasevalue inside of a C++ program [closed]

I am not very experienced in programming and I would like ot write a simple program in C++ where I want to print the bitcoin coinbase value in realtime. How can I get the coinbasevalue in c++? In a ...
4
votes
2answers
235 views

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 reward....

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